CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 1
Q.1 The solution of the complex [Cu(NH3)4]SO4 in Q.9 The neutral ligand is –
water – (1) Chloro (2) Hydroxo
(1) Will give the tests of Cu2+ ions (3) Ammine (4) Oxalato
(2) Will give the tests of NH3
Q.10 Glycinato ligand is –
(3) Will give the tests of SO42– ions
(4) Will not give the tests of any of the above ••
NH2
species (1) CH2 –
COO
Q.2 The donor atoms in EDTA are – (2) Bidentate ligand
(1) Two N and Two O (3) Two donor sites N and O–
(2) Two N and four O (4) All of these
(3) Four N and Two O
(4) Three N and three O Q.11 Triphenyl phosphine is –
(1) Neutral and monodentate ligand
Q.3 Which of the following ligands is not a chelating (2) Neutral and tridentate ligand
agent – (3) Uninegative and unidentate ligand
(1) EDTA (2) en (4) Trinegative and tridentate ligand
(3) Oxalate (4) Pyridine
Q.12 The addition compounds, which retain their
Q.4 An ambidentate ligand is one which – indentity in solution are called –
(1) is linked to the metal atom at two points (1) Double salts
(2) has two donor atoms but only one of them has (2) Complex compounds
the capacity to form a coordinate bond (3) Coordination compounds
(3) Has two donor atoms but either of the two can (4) (2) and (3) both
form a co-ordinate bond
(4) forms chelate rings Q.13 The total number of Ligands attached to the cen-
tral metal ion through coordinate bond is called –
Q.5 Coordination number and oxidation number of Cr (1) Valency of the metal ion
in K3[Cr(C2O4)3] are, respectively – (2) Oxidation state of the metal ion
(1) 4 and + 2 (2) 6 and + 3 (3) Coordinatin number of metal ion
(3) 3 and + 3 (4) 3 and 0 (4) None of the above

Q.6 All ligands are – Q.14 The co-ordination number and oxidation number
(1) Lewis acid (2) Lewis base of X in the compound [X(SO 4 )(NH3 ) 5 ] will
(3) Neutral (4) None of these be –
(1) 10 and +3 (2) 1 and +6
(3) 6 and +4 (4) 6 and +2
Q.7 In SCN ligand if N is attached to central atom, the
name of ligand is – Q.15 To form a coordinate bond, one needs a ligand.
(1) Thiocyanato-N (2) Cyanato-N Which of the following species cannot be a
(3) Thiocyanato-S (4) Cyanato-S ligand –
(i) NH4+ (ii) NO+
••
Q.8 Bidentate ligand is – (iii) C5H5 N
(1) CN– (2) Ethylene diamine (1) i only (2) i & ii only
(3) EDTA (4) SCN– (3) i & iii only (4) i, ii & iii only

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Q.16 The co-ordination number of cobalt in [Co(en)2Br2] Q.19 The oxidation and coordination number of Pt in
Cl is – [Pt(C2H4)Cl3]– is respectively -
(1) 2 (2) 4 (1) + 1, 3 (2) + 2, 4
(3) 6 (4) 8 (3) + 3, 6 (4) + 2, 5

Q.17 In which of the following complexes Ni metal is in Q.20 Which of the follwing is a -acid ligand –
highest oxidation state – (1) NH3 (2) CO
(1) Ni(CO)4 (2) K2NiF6 (3) F– (4) H2N–CH2–CH2–NH2
(3) [Ni(NH3)6] (BF4)2 (4) K4[Ni(CN)6]

Q.18 Which one of the following is not a condition for

complex formation -
(1) Small size
(2) Higher nuclear charge
(3) Availability of vacant d-orbitals
(4) Variable oxidation states

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 2
(WERNER'S THEORY & EAN)

Q.1 A co-ordination complex of cobalt has molecular for- Q.6 When potassium hexachloroplatinate (II) is
mula containing five ammonia molecules, one ni- dissolved in water. The solution –
tro group and two chlorine atoms for one cobalt (1) Contains 6 ions per molecule
atom. One mole of this compound produces three (2) Reacts with AgNO3 to give 6 moles of AgCl
mole ions in an aqueous solution. In reacting this (3) Does not contain any Cl– ion
solution with excess of silver nitrate solution, two (4) Contains K+, Pt4+ and Cl– ions
moles of AgCl get precipitated. The ionic formula
of this complex would be – Q.7 The fraction of chlorine pricipitated by AgNO3
(1) [Co(NH3)4.NO2Cl].[(NH3)Cl] solution from [Co(NH3)5Cl]Cl2 is –
(2) [Co(NH3)5Cl].[Cl(NO2)] (1) 1/2 (2) 2/3
(3) [Co(NH3)5(NO2)]Cl2 (3) 1/3 (4) 1/4
(4) [Co(NH3)5].[(NO2)2Cl2]
Q.8 Which of the following has the highest molar con-
Q.2 Which of the following complex will give white ductivity in solution –
precipitate with barium chloride solution – (1) [Pt(NH3)6]Cl4
(1) [Cr(NH3)5Cl]SO4 (2) [Pt(NH3)5Cl]Cl3
(2) [Cr(NH3)SO4]Cl (3) [Pt(NH3)4Cl2]Cl2
(3) [Co(NH3)6]Br3 (4) [Pt(NH3)3Cl3]Cl
(4) None of these
Q.9 Which of the following is non-ionizable –
Q.3 Which isomer of CrCl3.6H2O is dark green in colour (1) [Co(NH3)3Cl3]
and forms one mole of AgCl with excess of AgNO3 (2) [Co(NH3)4Cl2]Cl
solution – (3) [Co(NH3)5Cl]Cl3
(1) [Cr(H2O)6]Cl3 (4) [Co(NH3)6]Cl2
(2) [Cr(H2O)5Cl]Cl2.H2O
(3) [Cr(H2O)4Cl2]Cl.2H2O Q.10 A complex of platinum , ammonia and chlorine pro-
(4) [Cr(H2O)3Cl3].3H2O duces four ions per molecule in the solution . The
structure consistent with the observation is –
Q.4 Give the correct increasing order of electrical con- (1) [Pt(NH3)4]Cl4 (2) [Pt(NH3)2Cl4]
ductivity of aqueous solutions of following com- (3) [Pt(NH3)5Cl]Cl3 (4) [Pt(NH3)4Cl2]Cl2
plex entities –
I. [Pt(NH3)6]Cl4 Q.11 Match List I with List II and select the correct an-
II. [Cr(NH3)6]Cl3 swer using the codes given below the lists –
III. [Co(NH3)4Cl2]Cl List I List II
IV. K2[PtCl6] (Equ. conductance) (Formula)
(1) III < IV < II < I (2) IV < II < III < I (A) 229 (i) [Pt(NH3)5Cl]Cl3
(3) II < I < IV < III (4) I < II < IV < III (B) 97 (ii) [Pt(NH3)3Cl3]Cl
(C) 404 (iii) [Pt(NH3)4Cl2]Cl2
Q.5 The complex [Cr(H2O) 4Br 2]Cl in its aqueous (D) 523 (iv) [Pt(NH3)6]Cl4
solution gives test for – Code :
(1) Cl– ion (A) (B) (C) (D)
(2) Br– ion (1) iii i i iii
(3) Both Cl– and Br– ions (2) i iv iii ii
(4) Neither Cl– nor Br– ions (3) ii iii iv i
(4) iii ii i iv

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Q.12 Which of the following is most likely formula of Q.21 The complex CoCl3.5NH3 is aqueous solution ion-
1 izes to give a total number of ions equal to –
platinum complex, if of total chlorine of the com- (1) 0 (2) 2
4
(3) 3 (4) 4
pound is precipitated by adding AgNO3 to its aque-
ous solution –
Q.22 Which one is the most likely structure of CrCl3.6H2O
(1) PtCl4.6H2O (2) PtCl4.5H2O
if 1/3 of total chlorine of the compound is
(3) PtCl4.2H2O (4) PtCl4.3H2O
precipitated by adding AgNO3 to its aqueous
solution –
Q.13 FeCl3.4H2O is actually -
(1) CrCl3.6H2O
(1) [Fe(H2O)4]Cl3
(2) [Cr(H2O)3Cl3].(H2O)3
(2) [Fe(H2O)3Cl]Cl2.H2O
(3) [CrCl2(H2O)4]Cl.2H2O
(3) [Fe(H2O)4Cl2]Cl
(4) [CrCl(H2O)5]Cl2.H2O
(4) [Fe(H2O)3Cl2]Cl.H2O
Q.23 The complex that violates the EAN rule –
Q.14 The EAN of Cr in Cr(CO)6 is -
(1) Potassium ferrocyanide
(1) 36 (2) 38
(2) Potassium ferricyanide
(3) 28 (4) 54
(3) Tetra carbonyl Nickel
(4) Hexammine Cobalt (III) chloride
Q.15 The EAN of iron in K4[Fe(CN)6] is -
(1) 35 (2) 34
(3) 36 (4) 38

Q.16 If EAN of a central metal ion X+2 in a complex is 34.

and atomic number of X is 28. The number of
monodentet ligands present in complex are -
(1) 3 (2) 4
(3) 6 (4) 2

Q.17 The EAN of cobalt in the complex ion [Co(en)2Cl2]+

is -
(1) 27 (2) 36
(3) 33 (4) 35

Q.18 In the metal carbonyls of general formula M(CO)x

(Which follows EAN rule) if M is Ni, Fe and Cr the
value of x will be respectively -
(1) 6, 5, 6 (2) 4, 5, 6
(3) 4, 4, 5 (4) 4, 6, 6

Q.19 In which of the following complexes central metal

ion do not follows EAN rule -
(1) Fe(CO)5 (2) [CoF6]3–
2–
(3) [HgI4] (4) [Cr(H2O)6]+3

Q.20 Which of the following complexes has the least

molar conductivity in the solution –
(1) CoCl3. 3NH3 (2) CoCl3. 4NH3
(3) CoCl3. 5NH3 (4) CoCl3. 6NH3

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EXERCISE # 3
(IUPAC NOMENCLATURE)
Q.1 Which of the following is cationic complex - Q.8 The IUPAC name [Co(NH3)6] [Cr(CN)6] is –
(1) Tetracarbonyl nickel (0)
(1) Hexaammine cobalt (III) hexacyanochromate
(2) Hexachloroplatinante (III) ion
(III)
(3) Hexaaquairon (III) ion
(4) Tetraiodomercurate (II) ion (2) Hexacyanochromium cobalt hexaammine
chromium (VI)
Q.2 Chemical Name of "Turn bull's blue" is - (3) Hexaammine cobalt (III) hexacyanochromium
(1) Ferrous ferricyanide (VI)
(2) Potassium ferrocyanide (4) Hexacyanochromium (III) hexaammine
(3) Potassium cyanide
cobalt (III)
(4) Potassium ferricyanide
Q.3 The formula of dichloro bis (Urea) copper (II) is - Q.9 The IUPAC name for [Co(NCS)(NH3)5]Cl2 is
(1) [Cu{O = C(NH2)2}2]Cl2 (1) Pentaammine (thiocyanato-N) cobalt (III)
(2) [CuCl2{O = C(NH2)2}] chloride
(3) [Cu {O = C(NH2)2}Cl]Cl (2) Pentaammine (thiocyanato-S) cobalt (III)
(4) [CuCl2{O = C(NH2)2}2] chloride
(3) Pentaamine (isothiocyanato-N,S) cobalt (III)
Q.4 Which of the following complexes is not a chelate -
chloride
(1) bis (dimethylglyoximato) nickel(II)
(2) Potassium ethylenediamenetetrathiocyanato (4) Pentaammine (mercapto-N) cobalt (III)
chromate(III) chloride
(3) Tetrammine dichlorocobalt(III) nitrate
(4) Trans-diglycinatoplatinum (II) Q.10 The formula of the complex tris (ethylene diamine)
cobalt (III) sulphate is –
Q.5 The correct IUPAC name of the complex Fe(C5H5)2
(1) [Co(en)2SO4] (2) [Co(en)3SO4]
is –
(3) [Co(en)3]SO4 (4) [Co(en)3]2(SO4)3
(1) Cyclopentadienyl iron (II)
(2) Bis (cyclopentadienyl) iron (II)
Q.11 The IUPAC name of Fe(CO)5 is –
(3) Dicyclopentadiency ferrate (II)
(1) Pentacarbonyl ferrate (0)
(4) Ferrocene
(2) Pentacarbonyl Ferrate (III)
Q.6 The correct name of [Pt(NH3)4Cl2] [PtCl4] is – (3) Pentacarbonyl Iron (0)
(1) Tetraammine dichloro platinum (IV) (4) Pentacarbonyl Iron (II)
tetrachloroplatinate (II)
(2) Dichloro tetra ammine platinium (IV) tetrachloro Q.12 K3[Fe(CN)6] is –
platinate (II) (a) Potassium hexacynoferrous (III)
(3) Tetrachloro platinum (II) tetraammine platinate (b) Potassium hexacynoferrate (III)
(IV) (c) Potassium ferricyanide
(4) Tetrachloro platinum (II) dichloro tetraamine
(d) Hexa cyno ferrate (III) potassium
platinate (IV)
Correct answer is –
Q.7 The IUPAC name of K2[Cr(CN)2 O2(O)2 (NH3)] (1) Only (a) and (b) (2) Only (b) and (c)
is – (3) Only (a) and (c) (4) Only (b) and (d)
(1) Potassium amminedicyanodioxoperoxo
chromate (VI) Q.13 Give the IUPAC name of the complex
(2) Pot assi um a mm i necya n operoxodi oxo compound [Co(NH3)4(H2O)Br](NO3)2 –
chromium (VI) (1) BromoaquatetraamineCobalt (III) nitrate
(3) Pot assi um a mm i necya n operoxodi oxo (2) BromoaquatetraaminoCobalt (III) nitrate
chromium (VI) (3) BromoaquatetraammineCobaltate (III) nitrate
(4) Pot assi um a mm i necya n operoxodi oxo
(4) TetraammineaquabromoCobalt (III) nitrate
chromate (IV)

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Q.14 Which of the following statement is incorrect

Q.17 The IUPAC name for [(NH3)5 Cr–OH–Cr(NH3)5]5+ }
about [Fe(H2O)5NO]SO4 – is –
(1) It gives brown ring test for nitrates
(1) -hydroxo-bis (pentaammine dichromium) (V+)
(2) Oxidation state of Fe is + 1 ion
(3) It exhibits geometrical isomerism (2)-hydroxo-bis (decaammine dichromium) (V+)
(4) Charge on NO is +1
ion
Q.15 What is the oxidation number of chromium in the (3) -hydroxo-bis- (octaammine chromium (V+) ion
dimeric hydroxo bridged species
(4) -hydroxo-bis (pentammine chromium) (III) ion
H 4+
O Q.18 The most probable formula of prussian blue is –
(H2O)4 Cr Cr(H2O)4
O (1) Fe3[Fe(CN)6]2 (2) Fe2[Fe(CN)6]3
H (3) Fe4[Fe(CN)6]3 (4) Fe3[Fe(CN)6]4
(1) + 6 (2) + 4 (3) + 3 (4) + 2

Q.16 Correct formula of diammine silver (I) chloride

is –
(1) [Ag(NH3)Cl] (2) [Ag(NH2)Cl]
(3) [Ag(NH3)2]Cl (4) [Ag(NH2)2]Cl]

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EXERCISE # 4
(V.B.T & C.F.T)
Q.1 The complex ions [Fe(CN)6]3– and [Fe(CN)6]4–– Q.8 Match List I with List II and Select the correct an-
(1) Are both octahedral and paramagnetic swer using the codes given below the lists –
(2) Are both octahedral and diamagnetic List-1 List-2
(3) Have same structure but different magnetic Complex ions Magnetic Moment in
character Bohr Magnetons
a. [Fe(CN)6]–4 1. 1.73
(4) Have different structures but same magnetic
b. [Fe(CN)6]3+ 2. 5.93
character
c. [Cr(H2O)6]3+ 3. 0.00
Q.2 Which of the following contains one unpaired d. [Ni(H2O)6]2+ 4. 2.83
electron in the 4p orbitals – e. [FeF6]–3 5. 3.88
Code:
(1) [Cu(NH3)2]+ (2) [Cu(NH3)4]2+
3– a b c d e
(3) [Cu(CN)4] (4) [Ni(CN4)]2–
(1) 1 2 3 4 5
(2) 3 1 5 4 2
Q.3 Which order is correct in spectrochemical (3) 2 3 4 5 1
series of ligands – (4) 4 5 1 2 3
(1) Cl– < F– < C2O42– < NO2– < CN–
(2) CN– < C2O42– < Cl– > NO2– < F– Q.9 The species having tetrahedral shape is –
(3) C2O42– < F– < Cl– > NO2– < CN– (1) [PdCl4]2– (2) [Ni(CN)4]2–
(4) F– < Cl– < NO2– < CN– < C2O42– (3) [Pd(CN)4]2 (4) [NiCl4]2–

Q.4 Hexafluorocobaltate(III) ion is found to be high Q.10 Which of the following complexes are paramagnetic
spin complex, the probable hybrid state of in nature –
[Fe(CN)6]3– [Fe(CN)6]4– [CoF6]3– Ni(CO)4
cobalt in it is –
I II III IV
(1) d2 sp3 (2) sp3
(1) Only I (2) I and II
(3) sp3 d (4) sp3d2 (3) I and III (4) III and IV

Q.5 In an octahedral crystal field, the t 2g orbitals Q.11 Among the complex ions given below which is/are
outer-orbitals complex –
are – [Co(CN)6]4– [Fe(H2O)6]2+ [FeF6]3– [CoF6]3–
(1) Raised in energy by 0.4  0 I II III IV
(2) Lowered in energy by 0.4  0 (1) II, III, IV (2) II, III only
(3) Raised in energy by 0.6  0 (3) I, IV only (4) II only
(4) Lowered in energy by 0.6  0
Q.12 In which of following pairs of species the number
Q.6 If 0 < P, the correct electronic configuration for of unpaired electrons are same –
d4 system will be – (1) [CoF6]3–, [FeF6]3–
4 0 3 1 (2) [Fe(CN)6]3–, [Fe(CN)6]4–
(1) t 2g eg (2) t 2g eg (3) [Fe(CN)6]3–, [Ni(CN)4]2–
0 4 2 2
(4) [CoF6]3–, [Fe(H2O)6]2+
(3) t 2g t g (4) t 2g e g
Q.13 Aqueous solution of Ni2+ contains [Ni(H2O)6]2+ and
Q.7 For the t 62g e g2 system, the value of magnetic mo- its magnetic moment is 2.83 BM. When ammonia is
ment () is – added in it, comment on the magnetic moment of
(1) 2.83 B.M. (2) 1.73 B.M. solution –
(1) It will remain same
(3) 3.87 B.M. (4) 4.92 B.M.
(2) It increases from 2.83 BM
(3) It decreases from 2.83 BM
(4) It cannot be predicated theoretically

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Q.14 In the complex ion ML6n+, Mn+ has five d-electrons Q.22 The ion pair of the following in which both the ions
and L is weak field ligand. According to crystal field have same unpaired electron -
theory, the magnetic properties of the complex ion (1) Cr3+, Co2+ (2) Sc3+, Cr3+
correspond to how many unpaired electrons - +
(3) Cu , Fe3+ (4) Mn2+, Cu+
(1) 0 (2) 5
Q.23 Ti+2 and Ni2+ contain -
(3) 2 (4) 3
(1) Equal number of paired electrons
(2) Equal number of unpaired electrons
Q.15 Among Ni(CO)4, [Ni(CN)4]2– and [Ni(Cl)4]2– -
(3) Different number of 2p electrons
(1) Ni(CO)4 and [NiCl4]2– are diamagnetic and
(4) Different number of 3p electrons
[Ni(CN)4]2– is paramagnetic
(2) [Ni(Cl)4]2– and [Ni(CN)4]2– are diamagnetic and
Q.24 Amongest TiF62–, CoF63–, Cu2Cl2 and NiCl42– (At.
Ni(CO)4 is paramagnetic
No. Ti = 22, Co = 27, Cu = 29, Ni = 28), the colourless
(3) Ni(CO)4 and [Ni(CN)4]2– are diamagnetic and
species are -
[NiCl4]2– is paramagnetic
(1) TiF62– & Cu2Cl2 (2) Cu2Cl2 & NiCl42–
(4) [Ni(CO4)] is diamagnetic and [Ni(Cl)4]2– and
(3) TiF62– & CoF63– (4) CoF63– & NiCl42–
[Ni(CN)4]2– are paramagnetic
Q.16 In the complex [Ni(H2O)2(NH3)4]+2 the magnetic Q.25 Titanium shows magnetic moment of 1.73 B.M. in
moment () of Ni is - its compounds. What is the oxidation
(1) Zero (2) 2.83 BM number of Ti in the compound ?
(3) 1.73 BM (4) 3.87 BM (1) + 1 (2) + 4
(3) + 3 (4) + 2
Q.17 In which of the following molecules, central atom
used orbitals of different quantum number in the Q.26 In a transition series, as the atomic number increases,
hybridisation - paramagnetism -
(1) [Fe(CO)5] (2) IF7 (1) Increases gradually
(3) Ni(CO)4 (4) XeO4 (2) Decreases gradually
(3) First increases to a maximum and then
Q.18 What are the geometric shape and the oxidation decreases
number of the copper atom, respectively, for the (4) First decreases to a minimum and then
complex ion, [Cu(NH3)4(OH2)2]2+ ? increases
(1) Tetrahedral; + 2
(2) Square planar; – 2 Q.27 Which of the following compounds is (are) coloured
(3) Linear; + 3 due to charge transfer spectra and not due to d-d
(4) Octahedral; + 2 transition ?
(1) K2Cr2O7 (2) KMnO4
Q.19 The magnetic moment for Ti2+, V3+, and Ni2+ (3) Both (1) & (2) (4) None of these
is -
(1) 4.90 (2) 3.87 Q.28 Which of the following compounds has colour but
(3) 2.83 (4) 1.73 no unpaired electrons ?
(1) KMnO4 (2) K2MnO4
Q.20 = 15 is true for the pair - (3) MnSO4 (4) MnCl2
(1) Co+2, Cr+3 (2) Fe+2, Cr+3
Q.29 The correct order of magnetic moments (spin only
(3) Fe+3, Cr+2 (4) Mn+2, Fe+2
values in BM) among is -
Q.21 Which of the following has maximum magnetic mo- (1) [MnCl4]2– > [CoCl4]2– > [Fe(CN)6]4–
ment - (2) [Fe(CN)6]4– > [CoCl4]2– > [MnCl4]2–
(1) V3+ (2) Cr3+ (3) [Fe(CN)6]4– > [MnCl4]2– > [CoCl4]2–
(3) Fe3+ (4) Co3+ (4) [MnCl4]2– > [Fe(CN)6]4– > [CoCl4]2–

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Q.30 Which of the following compound is Q.34 The magnetic moments in the ions [Fe(CN)6]3– and
paramagnetic - [FeF6]3– in Bohr magneton are -
(1) Tetracyanonickelate (II) ion (1) 5.92 and 5.92 (2) 1.73 and 5.92
(2) Tetraamminezinc (II) ion (3) 1.73 and 1.73 (4) 2.83 and 4.90
(3) Hexaamine chromium (III) ion
(4) Diammine silver (I) ion Q.35 For the same transition metal ion, the colour of its
compound will depend upon the -
Q.31 Amongest the following ions which one has the (1) Temperature of the reaction
highest paramagnetism - (2) Pressure of the reaction
(1) [Cr(H2O)6]2+ (2) [Fe(H2O)6]3+ (3) Nature of ligands or Lewis bases attached
2+
(3) [Cu(H2O)6] (4) [Zn(H2O)6]2+ to the metal ion
(4) Concentration of the ligands
Q.32 For which of the dn Configuration, both low and
high spin complexes are possible - Q.36 Among the following compound that is both
(1) d9 (2) d3 paramagnetic and coloured is -
5
(3) d (4) d2 (1) K2Cr2O7 (2) (NH4)2[TiCl6]
(3) VOSO4 (4) K3[Cu(CN)4]
Q.33 The complex [Mn(CN)6]4– is -
(1) High spin complex
(2) Diamagnetic ion
(3) Having magnetic moment 1.73 BM
(4) Outer orbital complex

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 5
( IS OM E RI SM )

Q.1 The two compounds sulphato penta-ammine cobalt Q.7 Geometrical isomerism in coordination compounds
(III) bromide and sulphato penta-ammine cobalt (III) is exhibited by –
(1) Square planar and tetrahedral complexes
chloride represents -
(2) Square planar and octahedral complexes
(1) Linkage isomerism (3) Tetrahedral and octahedral complexes
(2) Ionisation isomerism (4) Square planar, tetrahedral and octahedral
(3) Co-ordination isomerism complexes
(4) No isomerism
Q.8 Which of the following is not optically active –
(1) [Co(en)3]3+
Q.2 Which of the following set of isomerism is wrong- (2) [Cr(ox)3]3–
(1) Cis-[Co(gly)2Cl2]– – optical isomerism (3) cis-[CoCl2(en)2]+
(2) [Zn(NH3)3Cl]+ – Geometrical isomerism (4) trans-[CoCl2(en)2]+
(3) [Fe(H2O)6]Cl3 – Hydrate isomerism
(4) [Co(en)2(NCS)2]Cl – Linkage isomerism Q.9 Which one of the following octahedral
complexes will not show geometrical isomerism (A
and B are monodentate ligands) –
Q.3 Which of the following common shapes (1 – IV)
(1) [MA5B] (2) [MA2B4]
can never exist as geometric isomers, regardless
(3) [MA3B3] (4) [MA4B2]
of the identity of the ligands -
(I) Linear (II) Square planar Q.10 [Co(NH3)5Br] SO4 and [Co(NH3)5SO4] Br are iso-
(III) Tetrahedral (IV) Octahedral mers –
(1) I only (2) I and II (1) Linkage (2) Geometrical
(3) I and III (4) II and IV (3) Ionization (4) Optical
Q.11 A complex shown below –
Q.4 Which of the following is pair of ionization A
isomers – F B
(1) [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br
(2) [Cr(H2O)5Cl]Cl2.H2Oand[Cr(H2O)4.Cl2]Cl.2H2O M
(3)[Co(NH3)6][Cr(CN)6] and [Cr(NH3)6] [Co(CN)6] E C
(4) cis-[Pt(NH3)2Cl2] and trans-[Pt(NH3)2Cl2]
D
(1) Optical isomerism only
Q.5 In coordination compounds, the hydrate (2) Geometrical isomerism only
isomers differ – (3) Both optical and geometrical isomerism
(1) In the number of water molecules of (4) None
hydration only
Q.12 The phenomenon of optical activity will be shown
(2) In the number of water molecules only by –
present as ligands
(3) Both (1) and (2) A
A
(4) In their coordination number of the metal B B A
atom M
(1) M (2) en
Q.6 The complex ions [Co(NH 3 ) 5 (NO 2 )] 2+ and B B B
[Co(NH3)5(ONO)]2+ are called – A B
(1) Ionization isomers en
(2) Linkage isomers A B
(3) Coordination isomers M
(3) en M en (4)
(4) Hydrate isomers
B
A en

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Q.13 A square planar complex represented as it will show Q.19 Which one of the following pairs of isomers and
which isomerism – types of isomerism are correctly matched –
NH2 NH2 (a) [Co(NH3)5(NO2)]Cl2 and [Co(NH3)5(ONO)]Cl2....
Linkage
CH2 CH2 (b) [Cu(NH3)4][(PtCl4)] and [Pt(NH3)4] [CuCl4]......
Co-ordination
CH2 CH2 (c) [Pt(NH3)4Cl 2)] Br2 and [Pt(NH3)4 Br2)]Cl2......
H2N H2 N Ionization
(1) Geometrical isomerism Select the correct answer using the codes given
(2) Optical isomerism below –
(3) Linkage isomerism (1) b and c (2) a, b and c
(4) None (3) a and c (4) a and b

Q.14 Cis-trans-isomerism is found in square planar com- A

plexes of the molecular formula (a and b are A B
monodentate ligands) –
(1) Ma4 (2) Ma3 b Q.20 The isomer M Can be marked
(3) Ma2b2 (4) Mab3 B A
as – A
Q.15 Out of the following which will not show
geometrical isomerism – (1) Dextro isomer (2) Laevo isomer
(3) Cis isomer (4) Trans isomer
(1) [Pt(NH3)2 (H2O)2]+2
(2) [Cr (NH3)5 Cl] Cl2 Q.21 How many isomer are theoretically possible for the
(3) [Co (en)2 Cl2] Cl formula [Pt(py)(NH3)(NO2)Cl Br I] –
(4) [Co(NH3)4Cl2]Cl (1) 3 (2) 4
(3) 8 (4) 15
Q.16 The complexes given below are – Q.22 The complex salt having the molecular composition
A en [Co(NO2)(SCN)(en)2] Br exhibits –
(1) Cis-Trans isomerism only
A
(2) Linkage only
en M en M (3) Ionisation only
(4) All the above
A
Q.23 How many geometrical isomers are possible for the
A en square-planar complex [Pt(NO 2)(py) (NH3)
(1) Geometrical isomers (NH2OH)] NO2 –
(2) Position isomers (1) 4 (2) 5
(3) Optical isomers (3) 8 (4) 3
(4) Identical
Q.24 Three arrangements are shown for the complex,
Q.17 Theoritically the No. of geometrical isomers ex- [Co(en)(NH3)2Br 2] + . Which one is the wrong
pected for octahedral complex [Mabcdef] statement –
is – Br Br Br
(1) Zero (2) 30 Br H3 N Br
(3) 15 (4) 9
Co en Co en en Co
H3N H3N NH3
Q.18 [(C 6 H5 ) 2 Pd(SCN) 2 ] and [(C 6 H5 ) 2 Pd(NCS) 2 ]
are – NH3 Br NH3
(1) Linkage isomers
(2) Co-ordination isomers (I) (II) (III)
(3) Ionisation isomers (1) I and II are geometrical isomers
(4) Geometrical isomers (2) II and III are optical isomers
(3) I and III are optical isomers
(4) II and III are geometrical isomers
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Q.25 Fac and Mer isomerism is associated with which of Q.32 Which of the following statement is correct?
the following general formula? (1) In [PtCl2(NH3)4]2+ complex ion, the cis-form
(1) [M(AA)2] (2) [M(AA)3] is optically active, while trans-form is
(3) [MABCD] (4) [MA3B3] optically inactive
(2) In [Fe(C2O4)3]3–, geometrical isomerism does
Q.26 Which of the following will have two stereoisomeric not exist, while optical isomerism exists
forms? (3) In [Mabcd]n± tetrahedral complexes, optical
(I) [Cr(NO3)3(NH3)3] (II) K3 [Fe(C2O4)3] isomerism cannot be observed
(III) [CoCl2(en)2]+ (IV) [CoBrCl(Ox)2]3– (4) In [Mabcd] n± square planar complexes,
(1) I only (2) I and II optical isomerism can be observed
(3) III and IV (4) All of these

Q.27 Select the correct code about complex

[Cr(NO2)(NH3)5] [ZnCl4]
(I) IUPAC name of compound is
pentaamminenitrito-N-Chromium (III)
tetrachlorozincate (II)
(II) It shows geometrical isomerism
(III) It shows linkage isomerism
(IV) It shows coordination isomerism
(1) III, IV (2) I, III and IV
(3) II, III and IV (4) I, II, III and IV

Q.28 Complex compound [Cr(NCS)(NH3)5][ZnCl4] will

be -
(1) colourless and diamagnetic
(2) green coloured and diamagnetic
(3) green coloured and shows coordination
isomerism
(4) diamagnetic and shows linkage isomerism
Q.29 The optically active species among the following
is -
(1) [Cr(NH3)6]3+ (2) [Co(CN)6]3–
(3) [Co(gly)3] (4) [Ru(NH3)]3+

Q.30 The complex with a maximum number of

stereoisomers is -
(1) [PtCl3(C2H4)]– (2) [CuBr2Cl2]2–
3–
(3) [Co(C2O4)3] (4) [Cr(NH3)2(en)2]3+

Q.31 Which of the following is incorrect about

Tetraamminedithiocyanato-s cobalt (III) tris(oxalato)
cobaltate (III)?
(1) It is a chelating complex and shows linkage
isomerism
(2) It shows optical isomerism
(3) It shwos geometrical isomerism
(4) Formula of the complex is
[Co(NCS)2(NH3)4][Co(ox)3]

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 6
(APPLICATION OF COORDINATION CHEMISTRY)

Q.1 The brown ring test for nitrites and nitrates is due Q.10 Which of the following organometallic compound
to the formation of a complex ion with formula - is used as fungicide in plant protection -
(1) [Fe(H2O)5NO+]2+ (2) [Fe(H2O)6]2+ (1) C2H5HgCl (2) (C2H5)2Zn
(3) [Fe(H2O)(NO)5]2– (4) [Fe(NO)(CN)5]2+ (3) (C2H5)4Pb (4) (C2H5)2Cd
Q.11 A person suffering from lead poisoning should be
Q.2 Nessler's reagent is -
fed with -
(1) K2HgI4 (2) K2HgI4 + KOH
(1) Hypo (2) Cis-platin
(3) K2HgI2 + KOH (4) K2HgI4 + Hg
(3) [Ca(EDTA)]2– (4) DMG
Q.3 The image on an exposed and developed
Q.12 Match List I with List II and select the correct an-
photography film is due to -
swer using the codes given below the lists -
(1) AgBr (2) [Ag(S2O3)2]3+
List I List II
(3) Ag (4) Ag2O
(A) Muscle contraction i. Zinc
(B) Blue-green algae ii. Cobalt
Q.4 The solubility of AgBr in hypo solution is due to
(C) Carboxypeptidase iii. Calcium
the formation of -
(D) Cyanocobalamine iv. Molybdenum
(1) Ag2SO3 (2) Ag2S2O3
Code :
(3) [Ag(S2O3)]– (4) [Ag(S2O3)2]3–
(A) (B) (C) (D)
(1) iv iii i ii
Q.5 Na2S2O3.5H2O is used in photography to -
(2) iii iv ii i
(1) Reduce AgBr to metallic Ag
(3) iv iii ii i
(2) Remove reduced Ag
(4) iii iv i ii
(3) Remove undecomposed AgBr as a soluble
complex
Q.13 How many H-bonds are present in the complex
(4) Converts metallic Ag to silver salt
entity formed by Ni2+ and dmg ligands –
(1) 2 (2) 3 (3) 4 (4) None
Q.6 Pick up the incorrect statement -
(1) Cisplatin is a complex of platinum
Q.14 Extraction of metals of other processes is through
(2) Vitamin B12 is a complex of cobalt
the complex formation –
(3) Chlorophyll is a complex of Mangenese
I : Cyanide process
(4) Haemoglobin is a complex of iron
II : Mond's process
III : Photographic fixing process
Q.7 K4[Fe(CN)6] reacts with FeCl3 to form -
Complexes formed in these methods are –
(1) K3[Fe(CN)6] (2) K4[Fe(CN)3Cl3]
I II III
(3) K3[Fe(CN)5Cl] (4) KFe[Fe(CN)6]
(1) [Ag(NH3)2]Cl Ni(CO)4 [Ag(CN)2]
Q.8 A blue colouration is not obtained when - (2) [Cd(CN)4]2– Ni(CO)4 [Ag(S2O3)2]3–
(1) NH4OH is added to CuSO4 (3) [Ag(CN)2]– Ni(CO)4 [Ag(S2O3)2]3–
– 3–
(2) CuSO4 solution reacts with K4[Fe(CN)6] (4) [Ag(CN)2] [Ag(S2O3)2] Ni(CO)4
(3) FeCl3 reacts with K4[Fe(CN)6]
(4) Anhydrous white CuSO4 is dissolved in water

Q.9 A reagent used for identifying nickel ion is -

(1) Potassium ferrocyanide
(2) Phenolphthalein
(3) Dimethyl glyoxime
(4) EDTA

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EXERCISE # 7
(ORGANOMETALLIC COMPOUNDS)

Q.1 Zeigler natta catalyst is - Q.8 Which of the following is not a -bonded
(1) Pt/PtO (2) Al(C2H5)3 + TiCl4 organometallic compound ?
(3) K(PtCl3(2 – C2H4)] (4) Pt/Rh (1) (C2H5)2Zn (2) Sn(C2H5)4
(3) [(CH3)3Al]2 (4) Fe(n 5 – C5H5)2
Q.2 In which of the following process OMC is formed
with the help of other OMC : Q.9 Ferrocene is -
(1) SnCl4 + Butyl lithium  Bu4Sn + 4LiCl (1) Fe(n5 – C5H5)2 (2) Cr(n6 – C6H6)2
2
(2) C2H5I + 4Pb/Na (alloy)  (C2H5)4 Pb + 4Nal (3) K[PtCl3(n – C2H4)] (4) (C2H5)4Pb
+ 3Pb
(3) Ni + 4CO  [Ni(CO)4] Q.10 OMC form during purification of a metal is -
(4) K2[PtCl4]+CH2 = CH2  K[PtCl 3(C2H4)] + (1) Ni(CO)4 (2) Pb(C2H5)4
KCl (3) Li – C4H9 (4) Na2[Ni(CN)4]

Q.3 CH3 – Mg – Br is an organometallic compound due Q.11 Which of the following is not an organo metallic
to - compound -
(1)  - bond between C and Mg (1) (C2H5)2Zn (2) CH3B(OCH3)2
(2) Mg - Br covalent bond (3) B(OCH3)3 (4) Ni(CO)4
(3)  - bond between C and Br
(4)  - bond between C and Mg Q.12 Which is/are organometallic ocmpound -
(I) Grignard reagent
Q.4 Which of the following is an organometallic (II) Sodium methoxide
compound - (III) trimethyl boron
(1) Ti(OCOCH3)4 (2) Ti(OC6H5)4 (IV) Al2(CH3)6
(3) Ti(OC2H5)3C2H5 (4) [Fe(CN)6]4– (1) Only I (2) I & II
(3) I, II, IV (4) I, III, IV
Q.5 Which of the following is an organometallic
compound -
(1) Lithium methoxide
(2) Lithium acetate
(3) Methyl lithium
(4) Lithium carbonate

Q.6 Which one of the following is used as a

heterogeneous catalyst ?
(1) Wilkinson's catalyst
(2) Tetraethyl lead
(3) Zeigler Natta catalyst
(4) Grignard's reagent

Q.7 Which of the followeing statement is true -

(1) FeCO3 and Fe3C are organometallic compunds
(2) In ferrocene ligand is cyclopentadienyl
(3) Pb (C2H5)4 is -bonded OMC
(4) In zeise salt central metal is sp3 hybridised

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 8
(d-BLOCK ELEMENTS)

Q.1 Mercury is transported in the container's made up Q.9 Which of the following sets of elements exhibits
of - decreasing order of atomic radii -
(1) Al (2) Fe (a) Sc, Y, La (b) Ti, V, Cr
(3) Ag (4) Pb (c) Ni, Cu, Zn (d) K, Ca, Sc
Correct answer is -
Q.2 Silver ornaments get tarnished in air due to the (1) Only b (2) b and c
reaction of Ag with - (3) b and d (4) All
(1) O2 (2) N2
(3) H2S (4) H2O Q.10 Which of the following set of metals can form
alloy -
(1) Cu – Au (2) Li – Na
Q.3 Pick out the incorrect statement for the transition
(3) Fe – Hg (4) All
metals -
(1) Cu+ (d10) is a transition metal ion Q.11 Which of the following shows maximum +8
(2) Transition metal ions are coloured oxidation state -
(3) 5d transition series placed in 5th period (1) Re (2) Os
(4) Cr+6 is more oxidising than Cr+3 (3) W (4) Ir

Q.4 Percentage of gold in 18 carats gold is - Q.12 Which has the lowest metling point ?
(1) 18 (2) 75 (1) Cs (2) Na
(3) 83.6 (4) 100 (3) Hg (4) Sn

Q.13 Which of the following oxide of chromium is

Q.5 Galvanised iron -
amphoteric in nature -
(1) Is an alloy of iron with galium
(1) CrO (2) Cr2O3
(2) Is iron used in a galvanometer
(3) CrO3 (4) CrO5
(3) Is iron coated with zinc
(4) Is an alloy of iron and zinc Q.14 The metallic bond strength in first transition series
increases from -
Q.6 Which of the following statement is not (1) Sc to Fe (2) Sc to Cr
correct - (3) Cr to Zn (4) Sc to Cu
(1) Fe, Ni, Co form interstetial compound
(2) CuSO 4 + Ca(OH) 2 is called Bordeaux Q.15 The pair in which both the elements generally shows
mixture only one oxidation state is -
(3) Verdigris is basic copper acetate (1) Sc and Zn (2) Zn and Cu
[Cu(COOCH3)2.Cu(OH)2] (3) Cu and Ag (4) Zn and Au
(4) 24 carat gold is an alloy of Au and Cu Q.16 Transition elements show variable oxidation states
because they lose electrons from the following or-
Q.7 Pick out the correct order - bitals -
(1) Elect. Conductivity Ag < Au < Al (1) ns and np (2) (n – 1) d and ns
(2) Density Hg < Au < Os (3) (n – 1) d (4) ns
(3) Melting point Cr > Mo > W
Q.17 The reason for the formation of complex
(4) Atomic size Sc < Ti < V
compounds by transition metal is -
(1) Availability of empty d-orbitals
Q.8 By which of the following ion, a transitional metal (2) Completely filled d-orbitals
can brought in to its highest oxidation state - (3) Paramagnetism
(1) F– (2) Cl– (4) Bigger size
–
(3) Br (4) I–
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Q.18 Which of the following is not a characteristic prop- Q.27 CuSO4 solution + lime is called -
erty of transition metal - (1) Lucas reagent (2) Barfoed's reagent
(1) High enthalpy of atomisation (3) Fehling solution A (4) Bordeaux mixture
(2) Formation of interstitial compounds
(3) Diamagnetism Q.28 Lunar caustic is -
(4) Variable oxidation state (1) NaOH (2) KOH
(3) Ba(OH)2 (4) AgNO3
Q.19 Transition metals ions form interstitial compounds
because -
Q.29 Baeyer's reagent is-
(1) Interstices are available in their crystal
(1) KMnO4 + H2SO4 (2) KMnO4 + KOH
lattice
(3) K2Cr2O7 + H2SO4 (4) K2Cr2O7 + KOH
(2) They have empty d-orbitals
(3) They have high value of ionic potential
Q.30 The highest oxidation state is exhibited by the tran-
(4) They show variable oxidation states
sition metals with configuration -
Q.20 Transition elements act as catalyst because - (1) (n – 1) d3ns2 (2) (n – 1) d5ns1
(1) Their melting points are higher (3) (n – 1) d5ns2 (4) (n – 1) d8ns2
(2) Their I.P. values are higher
(3) They have high density Q.31 Which oxide of manganese is acidic in nature -
(4) They can show variable oxidation states (1) MnO (2) Mn2O7
(3) Mn2O3 (4) MnO2
Q.21 Which of the following ions in solution undergoes
disproportionation - Q.32 The stability of particular oxidation state of a metal
(1) Fe+2 (2) Cr+3 in aqueous solution is determined by -
(3) Cu+ (4) Zn+2 (1) Enthalpy of sublimation of the metal
(2) Ionization energy
Q.22 Which of the following reagent does not contains (3) Enthalpy of hydration of the metal ion
d-block elements - (4) All of these
(1) Baeyer's reagent (2) Fehling solution
(3) Grignard reagent (4) Tollen's reagent Q.33 The correct formula of permanganic acid is -
(1) HMnO4 (2) HMnO5
Q.23 CrO3 is a/an..... (3) H2MnO4 (4) H2MnO3
(1) Acidic oxide (2) Basic oxide
(3) Neutral oxide (4) Amphoteric
Q.34 Which oxide of manganese is amphoteric ?
Q.24 The highest oxidation state achieved by a (1) MnO (2) MnO2
transition metal is given by - (3) Mn2O7 (4) Mn2O3
(1) ns electrons
(2) (n – 1) d electrons
(3) (n + 1) d electrons
(4) ns + (n – 1) d unpaired electrons
Q.25 Which of the following compounds is most likely
to contain non-metal atoms in the interstices of a
metals lattice ?
(1) Fe3O4 (2) TiN
(3) MnO2 (4) CoF2
Q.26 Which of the following transition metal has the high-
est melting point -
(1) Cr (2) Mo
(3) W (4) Hg

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EXERCISE # 9
(KMnO4, K2Cr2O7)

Q.1 An inorganic salt is lemon yellow in colour. It Q.8 The oxoanion which contains all equivalent
becomes orange in colour like methyl orange when M – O bond is -
it is acidic and again becomes yellow when it is (I) CrO42– (II) MnO4–
alkaline. The inorganic salt will be - (III) Cr2O72–
(1) Copper nitrate (1) III only (2) I, II, III
(2) Ferric chloride (3) I, II (4) I only
(3) Potassium chromate
(4) Potassium ferri cyanide Q.9 MnO2 dissolves in concentrated HCl to form -
(1) Mn4+ ion and Cl2
Q.2 The equilibrium (2) Mn2+ ion and Cl2
Cr2O72– 2CrO42– is shifted to right (3) [MnCl4]2– and Cl2
in - (4) only [MnCl4]2–
(1) An acidic medium (2) A basic medium
(3) A neutral medium (4) It does not exist Q.10 Pick out the incorrect statement -
(1) MnO2 dissolves in conc. HCl, but does not form
Q.3 K2Cr2O7 is preferred to Na2Cr2O7 for use in volu- Mn4+ ion
metric analysis as a primary standard becasuse - (2) Decomposition of acidic KMnO4 is not catalysed
(1) Na2Cr 2O7 is hygroscopic while K2 Cr2O7 is by sunlight
not (3) MnO42– is strongly oxidising and stable only in
(2) K2Cr 2O7 is hygroscopic while Na2 Cr2O7 is very strong alkali. In dilute alkali, water or acidic
not solution it disproportionates
(3) K2Cr2O7 is pure while Na2Cr2O7 is impure (4) KMnO 4 act as oxidising agent in
(4) None of these alkaline medium

Q.4 When MnO2 is fused with KOH, a coloured Q.11 The species that does not undergoes
compound is formed, the product and its colour is –
disproportionation in an alkaline medium is -
(1) K2MnO4, green (2) KMnO4, purple
(1) Cl2 (2) MnO42–
(3) Mn2O3, brown (4) Mn3O4 , black
(2) NO2 (4) ClO4–
Q.5 CrO42– (yellow) changes to Cr2O72– (orange) in pH =
x and vice-versa in pH = y. Hence, x and y are -
(1) 6, 8 (2) 6, 5
(3) 8, 6 (4) 7, 7

Q.6 During estimation of oxalic acid Vs KMnO4, self

indicator is -
(1) KMnO4 (2) oxalic acid
(3) K2SO4 (4) MnSO4

Q.7 When KMnO4 solution is added to hot oxalic acid

solution, the decolourisation is slow in the begin-
ning but becomes instantaneous after some time.
This is because -
(1) Mn2+ acts as auto catalyst
(2) CO2 is formed
(3) Reaction is exothermic
(4) MnO4– catalysis the reaction

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EXERCISE # 10
(f-BLOCK)
Q.1 The elements from throrium (At. No. 90) to Q.9 Name the three lanthanides which show + 2 oxidation
lawrencium (At. No. 103) in which 5f energy levels state also -
are filled up are called - (1) Sm, Tb, Gd (2) Sm, Eu, Yb
(1) Lanthanides (2) rare earths (3) La, Gd, Lu (4) Yb, Pm, Sm
(3) actinides (4) transuranics
Q.10 The chemist who has helped in the discovery of the
Q.2 Select the element in the following which does not maximum number of transuranic elements in the last
show + 4 oxidation state - 2 decades is -
(1) Ti (2) Zr (1) Sir Robert Robinson
(3) La (4) Pt (2) Sir J.J. Thomsom
(3) Prof. G.T. Seaberg
Q.3 Cerium can show the oxidation state of +4 (4) Sir C.N. Hinshelwood
because -
(1) It resemble alkali metals
(2) it has very low value of I.E.
(3) of its tendency to attain noble gas
configuration of xenon
(4) of its tendency to attain 4f7 configuration

Q.4 The elements from cerium (At. No. 58) to lutetium

(At. No. 71) in which 4f energy levels are filled up
are called -
(1) lanthanides (2) rare earths
(3) lanthanones (4) all the above

Q.5 The actinides showing +7 oxidation state are -

(1) U, Np (2) Pu, Am
(3) Np, Pu (4) None of these

Q.6 In aqueous solutin Eu+2 acts as -

(1) an oxidising agent
(2) reducing agent
(3) can act as redox agent
(4) None of them

Q.7 The maximum oxidation state shown by actinides

is -
(1) +6 (2) +7
(3) +5 (4) +4

Q.8 The outer electronic configuration of gadolinium

(At. No. 64) is -
(1) 4f7 5d1 6s2 (2) 4f8 5d0 6s2
8 1 1
(3) 4f 5d 6s (4) 4f7 5d0 6s2

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EXERCISE # 11 (A)
Q.1 The number of water molecule in Mohr's salt - Q.11 General electronic configuraton of transition element
(1) 7 (2) 5 [AIIMS 94] is - [AIPMT 96]
(3) 6 (4) 8 (1) ns2 (n – 1) d1–10 (2) ns2((n – 1)d10
(3) ns1 (4) ns2 np5
Q.2 Which metal is present in brass, bronze and german
silver - [AIIMS 94] Q.12 Electronic configuration of transition element x in
(1) Mg (2) Al +3 oxidation state is [Ar]3d4 than atomic no. will
(3) Cu (4) Zn be - [AIPMT 96]
(1) 25 (2) 26
Q.3 Which of the following metal react readily with (3) 22 (4) 19
water - [AIIMS 94]
(1) Copper (2) Nickel Q.13 Which of the following following compounds is
(3) Sodium (4) Silver known as white vitriol? [AIIMS 96]
(1) ZnSO4.7H2O (2) CaSO4.2H2O
Q.4 Amongest TiF 62–, CoF6–3, Cu 2Cl 2 and NiCl 4–2 (3) Na2SO4.7H2O (4) MgSO4.7H2O
colourless compound is - [AIPMT 95]
(1) Cu2Cl2 & NiCl4–2 (2) TiF6–3 and CoF6–3 Q.14 K2Cr2O7 on heating with aqueous NaOH -
(3) CoF6–3 and NiCl4–2 (4) TiF6–2 and Cu2Cl2 [AIPMT 97]
(1) CrO4–2 (2) Cr(OH)3
Q.5 General formula of metal carbonyl is M(CO) x (3) Cr2O7–2 (4) Cr(OH)2
(M = metal, x = 4). Metal is bonded with -
[AIPMT 95] Q.15 A complex compound of cobalt has molecular
(1) Oxygen (2) Carbon formula containing five NH3 molecules, one nitro
(3) both (4) Triple bond of CO group and two chlorine atom for one cobalt atom.
One mole of this compound produces three moles
Q.6 Geometrical isomer of [Pt(NH3)2Cl2] are - of ion in aqueous solution. On reaction with excess
(1) 2 (2) 1 [AIPMT 95] of AgNO 3 solution two moles of AgCl get
(3) 4 (4) 3 precipitated. The ionic formula of the compound -
(1) [Co(NH3)4NO2Cl] NH3Cl [AIIMS 97]
Q.7 Mercury alone is liquid metal at 0ºC due to - (2) [Co(NH3)5Cl] ClNO2
(1) Weak metallic attraction [AIPMT 95] (3) [Co(NH3)5NO2]Cl2
(2) High IP (4) [Co(NH3)5(NO2)Cl] Cl
(3) High vapour pressure
(4) 1 & 2 both Q.16 In the compound Lithium tetra-hydridoaluminate,
the ligand is - [AIIMS 97]
Q.8 Nessler's reagent is used in the test of - (1) H (2) H +

(1) NH4Cl (2) NH3 [AIIMS 95] (3) H– (4) F–

(3) NH4+ (4) All of these
Q.17 Which of the following compound, on reaction with
Q.9 Which of the following molecule or ions is a NaOH and Na2O2, gives yellow colour?
bidentate ligand ? [AIIMS 95] [AIIMS 97]
(1) C2O42– (2) Br2+ (1) Zn(OH)2 (2) Al(OH)3
(3) CH3NH2 (4) CH3 – C  N (3) Cr(OH)3 (4) CaCO3

Q.10 Which of the following complex has square planar Q.18 Which of the following compound is not
structure ? [AIIMS 95] coloured ? [AIIMS 97]
(1) [Ni(CN)4]2– (2) Ni(CO)4 (1) Na2[CuCl4] (2) Na2[CdCl4]
(3) [Zn(NH3)4]+2 (4) [NiCl4]2– (3) Fe4[Fe(CN)6]3 (4) K3[Fe(CN)6]
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Q.19 Which of the following is react with AgCl? Q.29 Oxidation state of osmium (Os) OsO4 is -
[AIIMS 97] [AIIMS 99]
(1) KCN (2) NH4OH (1) +4 (2) +6
(3) Na2S2O3 (4) All (3) +7 (4) +8
Q.20 The concentration of ZnCl2 solution will change
Q.30 In quantitative analysis of second group in lab.,
when it placed in a container which is made of -
H2S gas is passed in acidic medium for ppt. When
(1) Al (2) Cu [AIPMT 1998]
(3) Ag (4) None Cu+2 and Cd+2 react with KCN, than in which of the
following condition, ppt will not be formed due to
Q.21 Number of isomers of [Pt(NH3)4][CuCl4] complex relative stability - [AIPMT 2000]
are - [AIPMT 1998] (1) K2[Cu(CN)4] - More stable
(1) 2 (2) 3 K2[Cd(CN)4] - Less stable
(3) 4 (4) 5 (2) K2[Cu(CN)4] - Less stable
K2 [Cd(CN)4] - More stable
Q.22 Which of the following gives colour with water - (3) K3[Cu(CN)4] - More stable
[AIPMT 1998] K2[Cd(CN)4] - Less stable
(1) Cu+ (2) Cr3+
(4) K3[Cu(CN)4] - Less stable
(3) Na+ (4) None
K3 [Cd(CN)4] - More stable
Q.23 Maximum oxidation state will be of -
(1) La (2) Gd [AIPMT 1998] Q.31 Shape of Fe(CO)5 is - [AIPMT 2000]
(3) Eu (4) Am (1) Octahedral
(2) Square planar
Q.24 The IUPAC name of [Co(NH3)3ClBrNO2] will be - (3) Trigonal bipyramidal
[AIPMT 1998] (4) Square pyramidal
(1) Triamminebromochloronitrocobaltate (III)
(2) Triamminebromochloronitrocobalt (III) Q.32 Mg is present in - [AIPMT 2000]
(3) Triamminebromonitrochlorocabalt (III) (1) Chlorophyl (2) Haemoglobin
(4) Triamminenitrochlorocobalt (III) (3) Vitamin-12 (4) Vitamin-B
Q.25 Which one of the following shows maximum
Q.33 Which complex compound will give four
paramagnetic character? [AIIMS 98]
isomers - [AIPMT 2000]
(1) [Fe(CN)6]3–
(2) [Fe(CN)6]4– (1) [Fe(en)3]Cl3 (2) [Co(en)2Cl2]Cl
(3) [Cr(HO)6]3+ (3) [Fe(PPh3)3NH3ClBr]Cl (4) [Co(PPh3)3Cl]Cl3
(4) [Cu(H2O)6]2+
Q.34 CuSO4 dissolves in NH3 due to the formation
Q.26 Cr in [Cr(NH3) 6]Br 3 has number of unpaired of - [AIPMT 2000]
electron - [AIPMT 1999] (1) Cu(OH)2 (2) [Cu(NH3)4]SO4
(1) 4 (2) 3 (3) Cu[(NH3)4(OH)2] (4) CuO
(3) 1 (4) 2
Q.35 In dichromate ion - [AIIMS 2000]
Q.27 Which of the following compound is coloured and (1) 4 Cr – O bonds are equal
has unpaired electron - [AIPMT 1999]
(2) 6 Cr – O bonds are equal
(1) CuF2 (2) K2Cr2O7
(3) KMnO4 (4) K4[Fe(CN)6] (3) all Cr – O bonds are equal
(4) all Cr – O bonds are unequal
Q.28 FeCr2O7 reacts with Na2CO3 gives the product -
[AIPMT 1999] Q.36 In the formation of [Ni(CN) 4] 2–, the type of
(1) Na2CrO4 (2) Na2Cr2O7 hybridisation involved is - [AIIMS 2000]
(3) Fe3O4 (4) FeO (1) sp2 (2) sp3d
(3) dsp2 (4) sp3d

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Q.46 CuSO4 when reacts with KCN forms CuCN, which

Q.37 Philosopher's wool is formed by heating compound is insoluble in water. It is soluble in excess of KCN,
at 1100ºC. Identify the compound - due to formation of the following complex -
[AIIMS 2000] [AIPMT 2002]
(1) ZnCO3 (2) FeCO3 (1) K2[Cu(CN)4] (2) K3[Cu(CN)4]
(3) CuSO4.5H2O (4) FeSO4.7H2O (3) CuCN2 (4) Cu[KCu(CN)4]

Q.38 Which of the following will give maximum number Q.47 Which of the following does not have valence
of isomers - [AIPMT 2001] electron is 3d-subshell? [AIPMT 2002]
(1) [Co(NH3)4Cl2]+ (2) [Ni(en)(NH3)4]+2 (1) Fe (III) (2) Cr(I)
(3) [Ni(C2O4)(en)2]–2 (4) [Cr(SCN)2(NH3)4]+ (3) Mn(II) (4) P(0)

Q.39 Coordination number of Ni in [Ni(C2O4)3]–4 is - Q.48 Vitamin B12 contains - [AIPMT 2003]
(1) 3 (2) 6 [AIPMT 2001] (1) Zn(II) (2) Ca(II)
(3) 4 (4) 2 (3) Fe(II) (4) Co(III)

Q.40 Which of following organometallic compound is  Q.49 Which one of the following octahedral complexes
and  bonded - [AIPMT 2001] will not show geometric isomerism?
(1) [Fe(5 – C5H5)2] (2) K[Pt(Cl3(2 – C2H4)] (A and B are monodentate ligands) -
(3) [Co(CN)5NH3]+2 (4) Fe(CH3)3 [AIPMT 2003]
(1) [MA4B2] (2) [MA5B]
Q.41 Which statement is incorrect - [AIPMT 2001] (3) [MA2B4] (4) [MA3B3]
(1) Ni(CO)4 - Tetrahedral, paramagnetic
(2) [Ni(CO)4] - Square planar, diamagnetic Q.50 According to IUPAC nomenclature of sodium
(3) Ni(CO)4 - Tetrahedral, diamagnetic nitroprusside is named as - [AIPMT 2003]
(4) [NiCl4]–2 - Tetrahedral, paramagnetic (1) Sodium pentacyanonitrosyl ferrate (II)
(2) Sodium pentacyanonitrosyl ferrate (III)
Q.42 Which of the following will exhibit maximum ionic (3) Sodium nitroferricyanide
conductivity - [AIPMT 2001] (4) Sodium nitroferrocyanide
(1) K4[Fe(CN)6]
(2) [Co(NH3)6]Cl3 Q.51 The basic character of the transition metal
(3) [Cu(NH3)4Cl2] monoxides follows the order - [AIPMT 2003]
(4) [Ni(CO)4] (Atomic No. Ti = 22, V = 23, Cr = 24, Fe = 26)
(1) TiO > FeO > VO > CrO
Q.43 Which of the followign has highest second (2) TiO > VO > CrO > FeO
ionization energy? [AIMIS 2001] (3) VO > CrO > TiO > FeO
(1) Ni (2) V (4) CrO > VO > FeO > TiO
(3) Cr (4) Mn
Q.52 Among the following which is not the -bonded
Q.44 Atomic number of Cr and Fe are respectively 24 and organometallic compound - [AIPMT 2003]
26, which of the following is paramagnetic due to (1) Cr(6 – C6H6)2 (2) (CH3)4Sn
the spin of electron - [AIPMT 2002]
(3) K[PtCl3(2 – C2H4)] (4) Fe(5 – C5H5)2
(1) [Cr(CO)6] (2) [Fe(CO)5]
(3) [Fe(CN)6]–4 (4) [Cr(NH3)6]+3
Q.53 The correct order of ionic radii of Y3+, La3+, Eu3+ and
Q.45 The hypothetical complex chloro diaquatriammine Lu3+ is - [AIPMT 2003]
cobalt (III) chloride can be represented as - (1) Lu3+ < Eu3+ < La3+ < Y3+
(1) [CoCl(NH3)3(H2O)2]Cl2 [AIPMT 2002] (2) La3+ < Eu3+ < Lu3+ < Y3+
(2) [Co(NH3)3(H2O)Cl3] (3) Y3+ < La3+ < Eu 3+ < Lu3+
(3) [Co(NH2)3(H2O)2Cl] (4) Y3+ < Lu3+ < Eu3+ < La 3+
(4) [Co(NH3)3(H2O)3]Cl3
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Q.54 Which one of the following characteristics of the Q.62 Among [Ni(CO)4], [Ni(CN)4]2–, [NiCl4]2– species, the
transition metals is associated with their catalytic hybridization states at the Ni atom are, respectively
activity ? [AIPMT 2003] (At. no. of Ni = 28) - [AIPMT 2004]
(1) Colour of hydrated ions (1) dsp2, sp3, sp3 (2) sp3, dsp2, dsp2
(2) Variable oxidation states (3) sp3, dsp2, sp3 (4) sp3, sp3, dsp2
(3) High enthalpy of atomization
(4) Paramagnetic behaviour Q.63 Which of the following is considered to be an
anticancer species? [AIPMT 2004]
Q.55 The number of unapired electrons in the complex
ion [CoF6]3– is - [AIPMT 2003]
(1) 4 (2) zero
(1) (2)
(3) 2 (4) 3

Q.56 Colourless species is - [AIIMS 2003]

(1) VCl3 (2) VOSO4
(3) Na3VO4 (4) [Ni(H2O)6]SO4.H2O

Q.57 The complex which is used as anti cancer (3) (4)

agent - [AIIMS 2003]
(1) mer - [Co(NH3)3Cl3] (2) cis[PtCl2(NH3)2]
(3) cis K2[PtCl2Br2] (4) Na2CoCl4
Q.64 Which of the following does not have a metal-
Q.58 Among the following series of transition metals carbon bond ? [AIPMT 2004]
ions, the one where all metal ions have 3d 2 (1) Ni(CO)4 (2) Al(OC2H5)3
electronic configuration is - [AIPMT 2004] (3) C2H5MgBr (4) K[Pt(C2H4)Cl3]
2+ 3+ 4+ 5+
(1) Ti , V , Cr , Mn
(2) Ti 2+, V 2+, Cr3+, Mn4+ Q.65 Which of the following does not have optical
(3) Ti+, V4+, Cr6+, Mn7+ isomer ? [AIIMS 2004]
(4) Ti 4+, V3+, Cr2+, Mn3+ (1) [Co(NH3)3Cl3] (2) [Co(en)3]Cl3
(3) [Co(en)2Cl2]Cl (4) [Co(en)(NH3)2Cl2]Cl
Q.59 CN– is a strong field ligand. This is due to the fact
that - [AIPMT 2004] Q.66 Which one of the following is an inner orbital
(1) It forms high spin complexes with metal species complex as well as diamagnetic in behaviour -
(2) It gives negative charge [AIPMT 2005]
(3) It is a pseudohalide (1) [Zn(NH3)6]2+ (2) [Ni(NH3)6]2+
(4) It can accept electrons from metal species (3) [Cr(NH3)6]3+ (4) [Co(NH3)6]3+
[Atomic number : Zn = 30, Cr = 24, Co = 27, Ni = 28]
Q.60 Considering H2O as a weak field ligand, the number
of unpaired electrons in [Mn(H2O)6]2+ will be (At. Q.67 The aqueous solution containg which one of the
no. of Mn = 25) - [AIPMT 2004] following ions will be colourless - [AIPMT 2005]
(1) Four (2) Three (1) Fe2+ (2) Mn2+
(3) Five (4) Two (3) Ti3+ (4) Sc3+
[Atomic number : Sc = 21, Fe = 26, Ti = 22, Mn = 25]
Q.61 Which of the following coordination compounds
Q.68 Which one of the following pairs represents
would exhibit optical isomerism ? [AIPMT 2004]
stereoisomerism - [AIPMT 2005]
(1) tris-(ethylenediamine) cobalt (III) bromide
(1) Linkage isomerism and Geometric isomerism
(2) pentaamminenitrocobalt (III) iodide
(2) Chain isomerism and Rotational isomerism
(3) Diamminedichloroplatinum (II) (3) Optical isomerism and Geometri isomerism
(4) trans-dicyanobis (ehtylenediamine) chromium (4) Structural isomerism and Geometric isomerism
(III) chloride
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Q.69 Which one of the following is expected to exhibit Q.77 Which of the following compounds shows optical
optical isomerism - [AIPMT 2005] isomerism ? [AIIMS 2005]
(en = ethylenediamine) (1) [Cu(NH3)4]2+ (2) [ZnCl4]2–
(1) cis - [Pt(NH3)2Cl2] (3) [Cr(C2O4)3]2– (4) [Co(CN)6]3–
(2) cis - [Co(en)2Cl2]
(3) trans - [Co(en)2Cl2] Q.78 Which one of the following cyano complexes would
(4) trans - [Pt(NH3)2Cl2] exhibit the lowest value of paramagnetic behaviour?
[AIIMS 2005]
Q.70 An aqueous solution of CoCl2 on addition of excess (1) [CrCN)6] 3–
(2) [Mn(CN)6]3–
of concentrated HCl turns blue due to formations (3) [Fe(CN)6] 3–
(4) [Co(CN)6]3–
of - [AIIMS 2005]
(1) [Co(H2O)4Cl2] (2) [Co(H2O)2Cl4]2– Q.79 The value of 'spin only' magnetic moment for one of
(3) [CoCl4]2– (4) [Co(H2O)2Cl2] the following configurations is 2.84 BM. The correct
one is - [AIIMS 2005]
Q.71 In which of the following pairs both the complexes (1) d4 (in strong ligand field)
show optical isomerism ? [AIIMS 2005] (2) d4 (in weak ligand field)
(1) cis-[Cr(C2O4)2Cl2]3–, cis-[Co(NH3)4Cl2] (3) d3 (in weak as well as in strong fields)
(2) [Co(en)3] Cl3,cis-[Co(en)2Cl2]Cl (4) d5 (in strong ligand field)
(3) [PtCl(dien)]Cl, [NiCl2Br2]2–
(4) [Co(NO3)3(NH3)3], cis-[Pt(en)2Cl2] Q.80 The lanthanide contraction is responsible for the
Q.72 The diamagnetic species is - [AIIMS 2005] fact that - [AIIMS 2007]
(1) [Ni(CN)4]2– (2) [NiCl4]2– (1) Zr and Y have about the same radius
(3) [CoCl4]2– (4) [CoF6]2– (2) Zr and Nb have similar oxidation state
(3) Zr and Hf have about the same radius
Q.73 Among the following pairs of ions, the lower (4) Zr and Zn have the same oxidation state
oxidation state in aqueous solution is more stable
than the other in - [AIIMS 2005] Q.81 In which of the following pairs are both the ions
(1) Tl+, Tl3+ (2) Cu+, Cu2+ coloured in aqueous solution? [AIPMT 2006]
2+ +
(3) Cr2+, Cr3+ (4) V2+, VO2+ (1) Ni , Cu (2) Ni , Ti3+
2+

3+ 3+
(3) Sc , Ti (4) Sc3+, Co2+
Q.74 The correct order for the wavelength of absorption (At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
in the visible region is - [AIIMS 2005]
(1) [Ni(NO2)6]4– < [Ni(NH3)6]2+ < [Ni(H2O)6]2+ Q.82 Copper sulphate dissolves in excess of KCN to
(2) [Ni(NO2)6]4– < [Ni(H2O)6]2+ < [Ni(NH3)6]2+ give - [AIPMT 2006]
(3) [Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]4– (1) Cu(CN)2 (2) CuCN
(4) [Ni(NH3)6]2+ < [Ni(H2O)6]2+ < [Ni(NO2)6]4– (3) [Cu(CN)4]3– (4) [Cu(CN)4]2–

Q.75 The oxidation state of chromium in the final product Q.83 More number of oxidation states are exhibited by
formed by the reaction between KI and acidified the actinoids than by the lanthanoids. The main
potassium dichromate solution is - [AIIMS 2005] reason for this is - [AIPMT 2006]
(1) +4 (2) +6 (1) more active nature of the actinoids
(3) +2 (4) +3 (2) more energy difference between 5f and 6d
orbitals than that between 4f and 5d orbitals
Q.76 The IUPAC name of the coordination compound (3) leser energy difference between 5f and 6d
K3[Fe(CN)6] is - [AIIMS 2005] orbitals than that between 4f and 5d orbitals
(1) potassium hexacyanoferrate (II) (4) greater metallic character of the lanthanoids than
(2) potassium hexacyanoferrate (III) that of the corresponding actinoids
(3) potassium hexacyanoiron (II)
(4) tripotassium hexacyanoiron (II)

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Q.84 [Cr(H2O)6]Cl3 (at. no. of Cr = 24) has a magnetic Q.91 Given below, catalyst and corresponding process/
moment of 3.83 B.M. The correct distribution of 3d reaction are matched. The mismatch is -
electrons in the Chromium of the complex (1) [RhCl(PPh3)2 : Hydrogenation [AIIMS 2006]
is - [AIPMT 2006] (2) TiCl4 + Al(C2H5)3 :Polymerization
1 1 1
(3) V2O5 : Haber-Bosch process
(1) 3dxy , d yz , 3d z 2 (4) Nickel : Hydrogentaion
1 1
(2) 3dx2 y2 , 3d z 2 , 3d1xz Q.92 Among the following the species having square
planar geometry for central atom are -
1
(3) 3d1xy , 3dx2 y2 , 3d1yz [AIIMS 2006]
(i) XeF4 (ii) SF4
1 1
(4) 3dyz , 3dyz , 3d1xz (iii) [NiCl4]2– (iv) [PbCl4]2–
(1) (i) and (iv) (2) (i) and (ii)
Q.85 [Co(NH3)4(NO2)2]Cl exhibits - [AIPMT 2006] (3) (ii) and (iii) (4) (iii) and (iv)
(1) linkage isomerism, geometrical isomeris and
optical isomerism Q.93 Which of the following will give a pair of
enantiomorphs - [AIPMT 2007]
(2) linkage isomerism, ionization isomerism and
(1) [Cr(NH3)6][Co(CN)6]
optical isomerism
(2) [Co(en)2Cl2]Cl
(3) linkage isomerism, ionization isomerism and
(3) [Pt(NH3)4][PtCl6]
geometrical isomerism (4) [Co(NH3)4Cl2]NO2
(4) ionization isomerism, geometrical isomerism and
optical isomerism Q.94 The d electron configurations of Cr2+, Mn2+, Fe2+
and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively which
Q.86 The pair in which both species have same magnetic one of the following aqua complexes will exhibit the
moment (spin only value) is - [AIIMS 2006] minimum paramagnetic behaviour -
(1) [Cr(H2O)6]2+, [CoCl4]2– [AIPMT 2007]
(2) [Cr(H2O)6]2+, [Fe(H2O)6]2+ (1) [Fe(H2O)6]2+ (2) [Ni(H2O)6]2+
(3) Mn(H2O)6]2+, [Cr(H2O)6]2+ (3) [Cr(H2O)6]2+ (4) [Mn(H2O)6]2+
(4) [CoCl4]2–, [Fe(H2O)6]2+
Q.95 Which one of the following ions is the most stable
Q.87 The pair in which both species have iron is - in aqueous solution - [AIPMT 2007]
(1) Nitrogenase, cytochromes [AIIMS 2006] (1) V3+ (2) Ti3+
(2) Carboxypeptidase, haemoglobin (3) Mn3+ (4) Cr 3+
(3) Haemocyanin, nitrogenase
Q.96 Identify the incorrect statement among the
(4) Haemoglobin, cytochromes
following - [AIPMT 2007]
(1) Lanthanoid contraction is the accumulation of
Q.88 The colour imparted by Co(II) compounds to glass
successive shrinkages
is - [AIIMS 2006] (2) As a result of lanthanoid contraction, the
(1) Green (2) Deep-Blue properties of 4d series of the transition elements
(3) Yellow (4) Red have no similarities with the 5d series of
Q.89 The number of possible isomers of an octahedral elements
complex [Co(C2O4)2(NH3)2]– is - [AIIMS 2006] (3) Shielding power of 4f electrons is quite weak
(1) 1 (2) 2 (4) there is a decrease in the radii of the atoms or
(3) 3 (4) 4 ions as one proceeds from La to Lu

Q.97 The correct order of decreasing second ionisation

Q.90 The ligands in anti cancer drug cisplatin are -
enthalpy of Ti (22), V(23), Cr(24) and Mn (25)
[AIIMS 2006]
is - [AIPMT 2008]
(1) NH3, Cl (2) NH3, H2O (1) Mn > Cr > Ti > V (2) Ti > V > Cr > Mn
(3) Cl, H2O (4) NO, Cl (3) Cr > Mn > V > Ti (4) V > Mn > Cr > Ti

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

Q.98 Which of the following complexes exhibits the Q.106 Crystal field stabilization energy for high spin d4
highest paramagnetic behaviour? [AIPMT 2008]
(1) [Co(OX)2(OH)2]– octahedral complex is [AIPMT-2010]
(2) [Ti(NH3)6]3+ (1) –1.8 0 (2) –1.6 0 + P
(3) [V (gly)2(OH)2(NH3)2]+
(3) –1.2 0 (4) –0.6 0
(4) [Fe(en)(bpy)(NH3)2]2+
(Where gly = glycine, en = ethylenediamine and
bpy = bipyridyl moities) Q.107 The existence of two different coloured complexes

Q.99 In which of the following co-ordination entities the with the composition of [Co(NH3)4Cl2]+ is due to
magnitude of o (CFSE in octahedral field) will be (1) linkage isomerism [AIPMT-2010]
maximum? [AIPMT 2008]
(2) geometrical isomerism
(1) [Co(CN)6]3– (2) [Co(C2O4)3]3–
(3) [Co(H2O)6]3+ (4) [Co(NH3)6]3+ (3) coordination isomerism
(4) ionization isomerism
Q.100 Which of the following complex ions is expected to
absorb visible light ? [AIPMT 2009]
(1) [Zn(NH3)6]2+ (2) [Sc(H2O)3(NH3)3]3+ Q.108 Which of the following pairs has the same size?
(3) [Ti(en)2(NH3)2]4+ (4) [Cr(NH3)6]2+
[AIPMT-2010]
2+ 2+
Q.101 Out of TiF62–, CoF63–, Cu2Cl2 and NiCl42– colourless (1) Fe , Ni (2) Zr , Ti4+
4+

species are - [AIPMT 2009] (3) Zr4+, Hf 4+ (4) Zn2+, Hf 4+

(1) CoF63– and NiCl42–
(2) TiF62– and CoF62–
(3) Cu2Cl2 and NiCl42– Q.109 Which of the following oxidations states is the most
(4) TiF62– and Cu2Cl2 common among the lanthanoids -

Q.102 Which of the following does not show optical [AIPMT (M) -2010]
isomerism? [AIPMT 2009] (1) 2 (2) 5
(3) 3 (4) 4
(1) [Co(en)3]3+ (2) [Co(en)2Cl2]+
(3) [Co(NH3)3Cl3]0 (4) [Co(en)Cl2(NH3)2]+ Q.110 Which of the following complexes is not expected
to exhibit isomerism - [AIPMT (M) -2010]
Q.103 Which one of the elements with the following outer (1) [Pt(NH3)2Cl2] (2) [Ni(NH3)2Cl2]
orbital configurations may exhibit the largest number (3) [Ni(en)3]2+ (4) [Ni(NH3)4(H2O)2]+2
of oxidation states? [AIPMT 2009]
2 2
(1) 3d 4s 3 2
(2) 3d 4s Q.111 Acidified K 2Cr 2O7 solution turns green when
(3) 3d54s1 (4) 3d54s2 Na2SO3 is added to it. This is due to the formation
Q.104 Which of the following complex ion is not expected of : [AIPMT-2011]
to absorb visible light? [AIPMT-2010] (1) CrSO4 (2) Cr2(SO4)3
2– (3) CrO42– (4) Cr2(SO3)3
(1) [Ni (CN)4] (2) [Cr(NH3)6]3+
(3) [Fe(H2O)6]2+ (4) [Ni (H2O)6]2+
Q.112 For the four successive transition elements
(Cr, Mn, Fe and Co), the stability of +2 oxidation
Q.105 Which one of the following ions has electronic state will be there in which of the following order?
configuration [Ar] 3d6? [AIPMT-2010] (1) Cr > Mn > Co > Fe [AIPMT-2011]
(1) Ni3+ (2) Mn3+ (2) Mn > Fe > Cr > Co
(3) Fe > Mn > Co > Cr
(3) Fe3+ (4) Co3+
(4) Co > Mn > Fe > Cr
(At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28) (At nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

Q.113 The complex [Pt (Py) (NH3) Br Cl] will have Q.116 Of the following complex ions, which is
how many geometrical isomers ? diamagnetic in nature ? [AIPMT-2011]
3
(1) 2 (2) 3 [AIPMT-2011] (1) [CoF6] (2) [NiCl4]2–
(3) 4 (4) 0 (3) [Ni(CN)4]2– (4) [CuCl4]2–

Q.114 The complexes [Co(NH 3) 6 ] [Cr(CN) 6] and Q.117 Which of the following complex compounds will
[Cr(NH3)6] [Co(CN)6] are the examples of which exhibit highest paramagnetic behaviour?
type of isomerism ? [AIPMT-2011] [AIPMT MAINS-2011]
(1) Geometrical isomerism (1) [Zn(NH3)6]2+ (2) [Ti(NH3)6]3+
(2) Linkage isomerism (3) [Cr (NH3)6]3+ (4) [Co (NH3)6]3+
(3) Ionization isomerism (At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)
(4) Coordination isomerism

Q.115 The d-electron configurations of Cr2+, Mn2+, Fe2+

and Co2+ are d4, d5, d6 and d7 respectively. Which
one of the following will exhibit minimum
paramagnetic behaviour ? [AIPMT-2011]
2+
(1) [Cr(H2O)6] (2) [Mn(H2O)6]2+
2+
(3) [Fe(H2O)6] (4) [Co(H2O)6]2+
(At. Nos. Cr= 24, Mn= 25, Fe= 26, Co = 27)

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EXERCISE # 11 (B)
Q.1 Maximum no. of oxidation state of transitional metal Q.9 According to the postulates of Werner for
is given by the configuration - [RPMT 2000] coordination compounds - [MP PMT 2000, 02]
(1) ns e– (1) Primary valency is ionizable
(2) (n – 1)d e– (2) Secondary valency is ionizable
(3) (n + 1)d e– (3) Primary and secondary valencies are non
(4) ns + (n – 1) d Unpaired electron ionizable
(4) Only primary valency is non-ionizable
Q.2 When Fe is placed in air, what happens when it is
rusted - [RPMT 2000] Q.10 AgCl is soluble in NH4OH solution. The solubility
(1) Gain of e– is due to formation of - [Kerala MEE 2000]
(2) Loss of e– (1) AgOH (2) Ag2O
(3) Dehydration (3) [Ag(NH3)2]+ (4) NH4Cl
(4) Neither loss nor gain of e– (5) [AgCl(NH3)]

Q.3 Maximum paramagnetism in 3d series is shown by - Q.11 The number of isomers exhibited by [Cr(NH3)3Cl3]
[RPMT 2000] is - [Kerala MEE 2000]
(1) Mn (2) Co (1) 2 (2) 3
(3) Ni (4) Fe (3) 4 (4) 5
(5) 6
Q.4 In the following d-orbitals which will exhibit
maximum oxidation state - [RPMT 2000] Q.12 For the square planar complex [M(a) (b) (c) (d)]
(1) d 2 (2) d 5 where M = central metal and a, b, c and d are
(3) d3 (4) d9 monodentate ligands], the number of possible
geometrical isomers are - [Kerala MEE 2000]
Q.5 The secondary valency of Cr in the complex (1) 1 (2) 2
[Cr(H2O)4Cl2]+ is - [MP PMT 2000] (3) 3 (4) 4
(1) 1 (2) 3 (5) 5
(3) 5 (4) 6
Q.13 Which of the following will exhibit optical
Q.6 Which of the following is expected to be isomerism - [Kerala CEE 2000]
(1) [Cr(en)3]3+ (2) trans-[Cr(en)2Cl2]+
paramagnetic complex ? [MP PMT 2000]
(3) [Cr(NH3)6] 3+ (4) 1 and 2 both
(1) [Ni(H2O)6]2+ (2) [Ni(CO)4]
(3) [Zn(NH3)4]2+ (4) [Co(NH3)6]3+
Q.14 Trans uranic element are - [RPMT 2001]
Q.7 IUPAC name of Na3[Co(NO2)6] is - (1) Th, Np, Pu (2) Bk, Cf, Am
(1) Sodium cobaltnitrite [MP PMT 2000] (3) Tm, Nd, Pm (4) Pa, Fm, Md
(2) Sodium hexanitrito cobaltate (III)
(3) Sodium hexanitro cobalt (III) Q.15 The oxidation state of Ni and NH 3 in
(4) Sodium hexanitro cobaltate (III) [Ni(NH3)6]+2 - [RPMT 2001]
(1) Ni  +2 NH3 = 0 (2) Ni  +1 NH3 = – 1/6
Q.8 A group of atoms can function as a ligand only (3) Ni  +1 NH3 = + 1/6 (4) Ni  0 NH3 = +2
when - [MP PMT 2000]
(1) It is a small molecule Q.16 A complex Kn[MnF6] has magnetic moment 4.9 BM
(2) It has an unshaired electron pair what will be the oxidation state of Mn and the value
(3) It is a negatively charged ion of n? [RPMT 2001]
(4) It is a positively charged ion (1) Mn (II), n = 4 (2) Mn (III) ; n = 3
(3) Mn (IV); n = 2 (4) Mn (V) ;n = 1
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Q.17 Which of the following statement about AgCl is Q.25 The effective atomic number of iron in [Fe(CN)6]3–
incorrect - [RPMT 2001] is - [JIPMER 2001]
(1) AgCl is sparingly sluble in water (1) 34 (2) 36
(2) Agl is less soluble in water as compared to AgCl (3) 37 (4) 35
(3) AgCl precipitate is formed when AgNO3 and NaCl
are mixed Q.26 The geometry of the compound [Pt(NH3)2Cl 2]
(4) AgCl is more soluble in water then KI is - [DEC 2001]
(1) Square planar (2) Pyramidal
Q.18 The oxidation state of iron in K4[Fe(CN)6] is - (3) Tetrahedral (4) Octahedral
[Kerala MEE 2001]
(1) 1 (2) 2 Q.27 Which of the following group doesnot show linkage
(3) 4 (4) 6 isomerism? [DEC 2001]
(1) NO2– (2) SCN–
Q.19 The complex compounds [PtCl2(NH3)4]Br2 and (3) CN– (4) NH3
[PtBr2(NH3)4]Cl2 constitutes a pair of -
[Kerala CEE 2001] Q.28 Which of the following form an octahedral complex?
(1) Coordination isomers [DEC 2001]
(2) Linkage isomers 7
(1) d (High spin) 8
(2) d (High spin)
(3) Ionization isomers (3) d6 (high spin) (4) All
(4) Hydration isomers
(5) Optical isomers Q.29 How many ions are produced in aqueous solution
of [Co(H2O)6]Cl2 ? [RPMT 2002]
Q.20 In [Co(NH3)6]Cl3, the number of covalent bonds (1) 2 (2) 3
is - [MP PMT 2001] (3) 4 (4) 6
(1) 3 (2) 6
(3) 9 (4) 18 Q.30 [Ti (H2O)6] +3 is paramagnetic in nature due to -
[RPMT 2002]
Q.21 Which of the following compounds exhibits linkage (1) One unpaired e– (2) Two unpaired e–
isomerism? [MP PMT 2001] (3) three unpaired e– (4) No unpaired e–
(1) [Co(en)3]Cl3 (2) [Co(NH3)6 [Cr(en)3]
(3) [Co(en)2NO2Cl]Br (4) [Co(NH3)5Cl] Br Q.31 The aqueous solution of which compound is
coloured - [RPMT 2002]
Q.22 The oxidation number of cobalt in K[Co(CO)4] - (1) Zn (NO3)2 (2) LiNO3
[MP PMT 2001] (3) Co (NO3)2 (4) Ba (NO3)2
(1) +1 (2) –1
(3) +3 (4) –3 Q.32 The type of isomerism present in
nitropentamminechromium (III) ion is -
Q.23 The shape of cupraammonium ion is - [AIEEE-2002]
[RCET 2001] (1) Optical (2) Linkage
(1) Octahedral (2) Tetrahedral (3) Ionization (4) Polymerization
(3) Trigonal (4) Square planar
Q.33 A square planar complex is formed by hybridization
Q.24 The chemical formula for iron (III) of which atomic orbitals - [AIEEE-2002]
hexacyanoferrate(II) is - [JIPMER 2001]
(1) s, px, py, dyz (2) s, px, py, d x 2 – y 2
(1) Fe[Fe(CN)6] (2) Fe4[Fe(CN)6]
(3) Fe3[Fe(CN)6]4 (4) Fe4[Fe(CN)6]3 (3) s, px, py, d (4) s, px, py, dxy
z2

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Q.34 In [Cr(C2O4)3]3–, the isomerism shown is –

Q.43 In nessler reagent for the detection of ammonium
[AIEEE-2002]
(1) Ligand (2) Optical ion the active species is -
(3) Geometrical (4) Ionization (1) Hg2Cl2 (2) Hg+2
(3) Hg2I2 (4) HgI4–2
Q.35 In the complexes [Fe(H2O) 6] 3+, [Fe(CN) 6]3– , 2–
[Fe(C2O4)3]3– and [FeCl6]3–, more stability is shown (5) HgI2
by – [AIEEE-2002]
(1) [Fe(H2O)6]3+ (2) [Fe(CN)6]3+ Q.44 A red solid is insoluble in water. However it becomes
(3) [Fe(C2O4)3]3– (4) [FeCl6]3– soluble if some KI is added to water. Heating the
red solid in a test tube results in liberation of some
Q.36 Arrange Ce 3+ , La 3+ , Pm 3+ , and Yb 3+ in
violet coloured fumes and droplets of a metal appear
increasing order of their ionic radius -
[AIEEE-02 or DPMT 2010] on the cooler parts of the test tube. The red solid
(1) Yb3+ < Pm3+ < Ce3+ < La3+ is - [AIEEE-2003]
(2) Ce3+ > Yb3+ < Pm3+ < La3+ (1) HgI2 (2) HgO
(3) Yb3+ > Pm3+ < La3+ < Ce3+ (3) Pb3O4 (4) (NH4)2Cr2O7
(4) Pm3+ < La3+ < Ce3+ < Yb3+

Q.37 The catalyst used for the polymerization of olefins Q.45 A reduction in atomic size with increase in atomic
is - [Kerala CEE 2002] number is a characteristic of elements of -
(1) Ziegler-Natta catalyst [AIEEE-2003]
(2) Wilkinson's catalyst (1) d-block (2) f-block
(3) Pd - catalyst (3) radioactive series (4) high atomic masses
(4) Zeolite

Q.38 An example for a double salt is - [KCET 2002] Q.46 Which one of the following nitrates will leave
(1) Cuprammonium sulphate behind a metal on strong heating ? [AIEEE-2003]
(2) Mohr's salt (1) Copper nitrate (2) Manganese nitate
(3) Potassium ferricyanide (3) Silver nitrate (4) Ferric nitrate
(4) Cobalt hexammine chloride

Q.39 Which of the following species represent the Q.47 One mole of the complex compound Co(NH3)5Cl3,
example of dsp2 hybridization ? gives 3 moles of ions on dissolution in water. One
[KCET 01, Manipal 02]
(1) [Fe(CN)6]3– (2) [Ni(CN)4]2– mole of the same complex reacts with two moles of
(3) [Ag(CN)2] – (4) ]Co(CN)6[3– AgNO3 solution to yield two moles of AgCl(s). The
structure of the complex is – [AIEEE-2003]
Q.40 Which one of the following will not show
geometrical isomerism ? [MP PMT 2002] (1) [Co(NH3)3Cl3]. 2NH3
(1) [Cr(NH3)4Cl2]Cl (2) [Co(en)2Cl2]Cl (2) [Co(NH3)4Cl2] Cl. NH3
(3) [Co(NH3)5NO2]Cl2 (4) [Pt(NH3)2Cl2] (3) [Co(NH3)4Cl] Cl2. NH3
(4) [Co(NH3)5Cl] Cl2
Q.41 According to Lewis, the ligands are -
(1) Acidic in nature [MP PMT 2002] Q.48 In the coordination compound K4[Ni(CN)4], the
(2) Basic in nature oxidation state of nickel is – [AIEEE-2003]
(3) Neither acidic nor basic (1) 0 (2) +1
(4) some are acidic and others are basic (3) +2 (4) –1

Q.42 The most stable complex among the following is - Q.49 The number of 3d-electrons remained in Fe2+ (At.
[MP PMT 2002]
no. of Fe = 26) is – [AIEEE-2003]
(1) K3 [Al(C2O4)3] (2) [Pt(en)2]Cl2
(3) [Ag(NH3)2]Cl (4) K2[Ni(EDTA)] (1) 4 (2) 5 (3) 6 (4) 3

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Q.50 Ammonia forms the complex ion [Cu(NH3)4]2+ ion Q.57 Of the following outer electronic configurations of
with copper ions in alkaline solutions but not in atoms, the highest oxidation state is achieved by
acidic solution. What is the reason for which one of them- [AIEEE-2004]
(1) (n – 1) d3ns2 (2) (n – 1) d5ns1
it – [AIEEE-2003]
(3) (n – 1) d8ns2 (4) (n – 1) d5ns2
(1) In acidic solution hydration protects copper
ions Q.58 Excess of KI reacts with CuSO4 solution and then
(2) In acidic solutions protons coordinate with Na 2S2O3 solution is added to it. Which of the
ammonia molecules forming NH4+ ions and NH3 statements is incorrect for this reaction -
molecules are not available [AIEEE-2004]
(3) In alkaline solutions insoluble Cu(OH) 2 is (1) Na2S2O3 is oxidised
precipitated which is soluble in excess of any (2) CuI2 is formed
alkali (3) Cu2I2 is formed
(4) Copper hydroxide is an amphoteric substance (4) Evolved I2 is reduced

Q.51 What would happen when a solution of potassium Q.59 Which one of the following has largest number of
isomers - [AIEEE-2004]
chromate is treated with an excess of dilute nitric
(1) [Ir(PR3)2H(CO)]2+ (2) [Co(NH3)5Cl]2+
acid - [AIEEE-03] (3) [Ru(NH3)4Cl2]+ (4) [Co(en)2Cl2]+
(1) Cr3+ and Cr2O72– are formed (R = alkyl group, en = ethylenediamine)
(2) Cr2O72– and H2O are formed
(3) Cr2O72– is reduced to +3 state of Cr Q.60 Among the properties (a) reducing (b) oxidising (c)
complexing, the set of properties shown by CN– ion
(4) Cr2O72– is oxidised to +7 state of Cr
towards metal species is – [AIEEE-2004]
(1) c, a (2) b, c
Q.52 The atomic number of vanadium (V), chromium (Cr), (3) a, b (4) a, b, c
manganese (Mn) and iron (Fe) are 23, 24, 25 and 26 Q.61 The coordination number of a central metal atom in
respectively. Which one of these may be expected a complex is determined by – [AIEEE-2004]
to have the highest second ionisation enthalpy - (1) The number of ligands around a metal ion bonded
[AIEEE-03] by sigma and pi-bonds both
(1) V (2) Cr (2) The number of ligands around a metal ion bonded
(3) Mn (4) Fe by pi-bonds
(3) The number of ligands around a metal ion bonded
Q.53 The radius of La3+ is 1.06 Å, which of the following by coordinate bonds
given values will be closest to the radius of Lu3+ (4) The number of only anionic ligands bonded to
(At no. of Lu = 71, La = 57) - [AIEEE-03] the metal ion
(1) 1.6 Å (2) 1.4 Å
(3) 1.06 Å (4) 0.85 Å Q.62 Which one of the following complexes in an outer
orbitals complex – [AIEEE-2004]
Q.54 Element shows highest oxidation state is - (1) [Co(NH3)6]3+ (2) [Mn(CN)6]4–
[RPMT 2003] (3) [Fe(CN)6]4– (4) [Ni(NH3)6]2+
(1) Ti (2) U (Atomic nos. : Mn = 25; Fe = 26; Co = 27; Ni = 28)
(3) Ni (4) Mn Q.63 Coordination compounds have great importance in
biological systems. In this contect which of the
Q.55 Element having generally high melting and boiling following statements is incorrect ? [AIEEE-2004]
point are - [RPMT 2003] (1) Cyanocobalamin is vitamin B12 and contains
(1) Alkali metal (2) Transition element cobalt
(3) Halogen (4) Alkaline earth metal (2) Haemoglobin is the red pigment of blood and
contains iron
Q.56 Magnetic moment of Fe+3 is - [RPMT 2003] (3) Chlorophylls are green pigments in plants and
(1) 0.5 (2) 1.8 contain calcium
(4) Carboxypeptidase-A is an enzyme and contains
(3) 5.8 (4) 12.6
zinc
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Q.64 The correct order of magnetic moments (spin only Q.72 Vanadium (+5) oxide is a strong -
values in B.M. among is) – [AIEEE-2004] [Kerala PMT 2004]
(1) [Fe(CN)6]4– > [MnCl4]2– > [CoCl4]2– (1) drying agent (2) oxidisng agent
(2) [MnCl4]4– > [Fe(CN)6]4– > [CoCl4]2– (3) reducing agent (4) precipitating agent
(3) [MnCl4]2– > [CoCl4]2– > [Fe(CN)6]4–
(4) [Fe(CN)6]4– > [CoCl4]2– > [MnCl4]2– Q.73 When one mol of each of the following complex
(Atomic nos : Mn = 25 ; Fe = 26 ; Co = 27 ; salts is treated with excess of AgNO3, which of them
Ni = 28) gives maximum aomount of AgCl ?
[Kerala PMT 2004]
Q.65 Cerium (Z = 58) is an important member of the (1) [Co(NH3)6]Cl3 (2) [Co(NH3)5 Cl]Cl2
lanthanoids. Which of the following statement (3) [Co(NH3)4Cl2]Cl (4) Na2[PtCl4]
about cerium is incorrect - [AIEEE-04] (5) [Co(NH3)3Cl3]
(1) Cerium (IV) acts as an oxidising agent
Q.74 A solid (A) which has photographic effect reacts
(2) The +3 oxidation state of cerium is more stable
with the solution of a sodium salt (B) to give a pale
than the +4 oxidation state
yellow ppt. (C). Sodium salt on heating gives brown
(3) The +4 oxidation state of cerium is not known in
vapour. Identify A, B and C - [ORISSA JEE 2004]
solutions
(1) AgNO3,NaBr,AgBr
(4) The common oxidation states of cerium are +3
(2) AgNO3,NaCl,AgCl
and +4
(3) AgNO3,NaBr,AgCl
Q.66 Calomel on reaction with NH4OH gives - (4) AgCl, NaBr, AgBr
[AIEEE-04]
(1) HgNH2Cl (2) NH2–Hg–Hg–Cl Q.75 Which is an amphoteric oxide ?
(3) Hg2O (4) HgO [ORISSA JEE 2004]
(1) ZnO (2) CaO
Q.67 In which of the following oxidation state of Mn is (3) BaO (4) SrO
six - [RPMT 2004]
(1) K2MnO4 (2) MnO2 Q.76 What is the magnetic moment of [FeF6]3– ?
(3) KMnO4 (4) MnO4–1 [ORISSA JEE 2004]
(1) 5.92 (2) 5.49
Q.68 Which has maximum magnetic moment - (3) 2.34 (4) 4.0
[RPMT 2004]
(1) Co+2 (2) Mn +3 Q.77 The value of the 'spin only' magnetic moment for
(3) Mn+2 (4) Cr+3 one of the following configurations is 2.84 BM .
The correct one is – [AIEEE-2005]
Q.69 Which has wrong electronic configuration - (1) d4 (in strong ligand field)
[RPMT 2004] (2) d4 (in weak ligand field)
2
(1) P =[Ne] 3s 3p 3 (2) Cu = [Ar] 3d10 4s1 (3) d3 (in weak as well as in strong field)
2 2 (4) d5 (in strong ligand field)
(3) Ti = [Ar] 3d 4s (4) V = [Ar] 3d2 4s2
Q.78 The lanthanoid contraction is responsible for the
Q.70 EDTA has coordination sites - [AFMC 2004] fact that - [AIEEE-05]
(1) 3 (2) 4 (1) Zr and Y have about the same radius
(3) 5 (4) 6 (2) Zr and Nb have similar oxidation state
(3) Zr and Hf have about the same radius
Q.71 What is the net charge on ferrous ion? (4) Zr and Zn have similar oxidation state
[AFMC 2004]
Q.79 The paramagnetic property is due to presence of -
(1) +2 (2) +3 [RPMT 2005]
(3) +4 (4) +5 (1) Unpaired e– (2) Paired e–
(3) Lone pair e– (4) None
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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

Q.89 The correct order of hybridisation of the central

Q.80 Transition elements are - [RPMT 2005] atom in the following species NH3,[PtCl4]2–, PCl5
(1) All metals and BCl3 is- [BHU 2005]
(2) Some metals & some nonmetals
(1) dsp2, dsp3, sp2, sp3 (2) sp3, dsp2, dsp3, sp2
(3) All solids
(3) dsp2, sp2, sp3, dsp3 (4) dsp2, sp3, sp2, sp3
(4) All very high reactive

Q.90 The IUPAC name for the complex [Co(NO2)(NH3)5]

Q.81 The oxidation number of mangnese in KMnO4 is -
[RPMT 2005] Cl2 is – [AIEEE-2006]
(1) 2 (2) 4 (1) petaammine nitrito-N-cobalt (II) chloride
(2) pentaammine nitrito-N-cobalt (III) chloride
(3) 7 (4) 8
(3) nitrito-N-pentaamminecobalt (III) chloride
Q.82 Which of the following pairs of elements can not (4) nitrito-N-pentaamminecobatl (II) chloride
form an alloy? [KCET 2005] Q.91 Nickel (Z = 28) combines with a ninegative
(1) Zn, Cu (2) Fe, Hg monodentate ligand X– to form a paramagnetic
(3) Fe, Cu (4) Hg, Na complex [NiX4]2–. The number of unpaired electron
Q.83 Which compound is zero valent metal complex? in the nickel and geometry of this complex ion are
[KCET 2005] respectively – [AIEEE-2006]
(1) [Cu(NH3)4]SO4 (2) [Pt(NH3)2Cl2] (1) one, square planar (2) two, square planar
(3) [Ni(CO)4] (4) K3[Fe(CN)6] (3) one, tetrahedral (4) two, tetrahedral

Q.92 In Fe(CO)5, the Fe–C bond possesses –

Q.84 Which of the following types of metals form the
[AIEEE-2006]
most efficient catalysts ? [KCET 2005]
(1) ionic character
(1) alkali metals (2) akaline earth metals
(2) -character only
(3) transitiom metals (4) all of these
(3) -character
(4) both  and  character
Q.85 Which of the following biomolecules contain non-
transition metal ion? [KCET 2005]
Q.93 How many EDTA (ethylenediaminetetraacetate ion)
(1) vitamin B12 (2) chlorophyll
molecules are required to make an octahedral
(3) haemoglobin (4) insulin
complex with a Ca2+ ion ? [AIEEE-2006]
(1) One (2) Two
Q.86 Cr is member of 3d transition series of atomic number
(3) Six (4) Three
24. What will be its electronic configuration?
[BHU 2005]
Q.94 The ''spin-only'' magnetic moment [in units of Bohr
(1) 3d64s2 (2) 3d54s2
magneton] of Ni2+ in aqueous solution would be
(3) 3d 44s2 (4) 3d54s1
(At. No. Ni = 28) – [AIEEE-2006]
(1) 0 (2) 1.73
Q.87 Which of the following have maximum number of
(3) 2.84 (4) 4.90
unpaired electrons? [BHU 2005]
3+ 2+
Q.95 Lanthanoid contraction is caused due to -
(1) Fe (2) Fe
[AIEEE-06]
(3) Co2+ (4) Co3+
(1) the same effective nuclear charge from Ce to Lu
(2) the imperfect shielding on outer electrons by 4f
Q.88 Transition metals show paramagnetism -
electrons from the nuclear charge
[BHU 2005]
(3) the appreciable shielding on outer electrons by
(1) due to characteristic configuration
4f electrons from the nuclear charge
(2) high lattice energy
(4) the appreciable shielding on outer electrons by
(3) due to variable oxidation states
5d electrons from the nuclear charge
(4) due to unpaired electrons

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Q.96 Which of the following ion is colourless - Q.103 The hybridisation of A and B are -
[RPMT 2006] [IIT-JEE 2006]
(1) Cu+ (2) Co+2 (1) dsp2, sp3 (2) sp3, sp3
(3) Fe+3 (4) Ni+2 (3) dsp2, dsp2 (4) sp3d2, d2sp3

Q.104 Which one of the following has a square planar

Q.97 Which of the following element make interstitial
geometry - (Co = 27, Ni = 28, Fe = 28, Fe = 26, Pt = 78)
compound - [RPMT 2006]
[AIEEE-2007]
(1) Fe (2) Co (1) [CoCl4]2– (2) [FeCl4]2–
(3) Ni (4) All (3) [NiCl4]2– (4) [PtCl4]2–

Q.98 Atomic number 21, shows the oxidation Q.105 Identify the incorrect statement among the
states - [RPMT 2006] following - [AIEEE-07]
(1) +1 (2) +3 (1) d-block elements show irregular and errati chemi-
(3) –1 (4) +5 cal properties among themselves
(2) La and Lu have partially filled d-orbitals and no
Q.99 Transition element makes complex compound due other partially filled orbitals
to - [RPMT 2006] (3) The chemistry of various lanthanoids is very
(1) Presence of empty d-orbital similar
(2) large size (4) 4f and 5f-orbitals are equally shielded
(3) Variable valency Q.106 The actinoids exhibits more number of oxidation
(4) presence of 2e– states in general than the lanthanoids. This is be-
cause - [AIEEE-07]
Q.100 CuSO4 decolourises on addition of excess KCN, (1) The 5f-orbitals are more buried than the 4f
the product is - [IIT-JEE 2006] orbitals
(1) [Cu(CN)4] 2– (2) There is a similarly between 4f-and-5f in the their
(2) Cu2+ get reduced to form [Cu(CN)4]3– angular part of the wave function
(3) Cu(CN)2 (3) The actinoids are more reactive than the
(4) CuCN lanthanoids
(4) The 5f-orbitals extend further from the nucleus
than the 4f-orbitals
Q.101 The coordination number of Ni+2 is = 4
NiCl2 + KCN (Complex)  A (Complex) Q.107 Fac.Mer isomerism is associated with which one of
A + Conc. HCl (Maximum)  B the following complexes? [M = central metal]
(Chloro complex) [KERALA PMT 2007]
The IUPAC name of A and B are - [IIT-JEE 2006] (1) [M(AA)2] (2) [MA3B3]
(1) potassium tetracyanonickelate (II), potassium (3) [M(AA)3] (4) [MABCD]
tetrachloronickelate (II) (5) [MA4B2]
(2) tetracyanopotassiumnickelate(II), tetrachloro
potassiumnickelate (II) Q.108 Which one of the following is tridentate ligand -
(3) tetracyanonickel (II), tetrachloronickel (II) [KERALA PMT 2007]
(4) Potassiumtetracyanonickel (II), (1) NO2– (2) Oxalate ion
potassiumtetrachloronickel (II) (3) glycinate ion (4) dien
(5) EDTA
Q.102 Predict the magnetic nature of A and B
[IIT-JEE 2006] Q.109 The dark bue colour of the solution formed when
(1) both are diamagnetic excess of ammonia is added to a solution of copper
(2) A is a diamagnetic and B is paramagnetic with (II) sulphate is due to the presence of the ion
one unpaired electron [KERALA PMT 2007]
(3) A is diamagnetic and B is paramagnetic with two (1) [Cu(OH)4(H2O)2]2– (2) [Cu(H2O)6]2+
unpaired electrons (3) [Cu(NH4)2(H2O)4]4+ (4) [Cu(NH3)2(H2O)4]2+
(4) both are paramagnetic (5) [Cu(NH3)4(H2O)2]2+

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

Q.110 KMnO4 is a strong oxidizing agent in acid medium.

Q.116 The coordination number and the oxidation state
To provide acid medium H2SO4 is used instead of
of the element 'E' in the complex [E(en)2(C2O4)] NO2
HCl. This is because - [KERALA PMT 2007]
(where (en) is ethylene diamine) are, respectively –
(1) H2SO4 is a stronger acid than HCl
(2) HCl is oxidized by KMnO4 to Cl2 [AIEEE-2008]
(3) H2SO4 is a dibasic acid (1) 6 and +2 (2) 4 and +2
(4) rate is faster in the presence of H2SO4 (3) 4 and +3 (4) 6 and +3
(5) only H2SO4 is completely ionized
Q.117 In which of the following octahedral complexes of
Co (at. no. 27), will the magnitude of 0 be the
Q.111 The correct order of ionic radii of Y3+, La3+, Eu3+
and Lu+3 is - [KERALA PMT 2007] highest ? [AIEEE-2008]
(1) Y3+ < La3+ < Eu3+ < Lu3+ (1) [Co(CN)6]3– (2) [Co(C2O4)3]3–
(2) Lu+3 < Eu3+ < La3+ < Y3+ (3) [Co(H2O)6]3+ (4) [Co(NH3)6]3+
(3) La3+ < Eu+3 < Lu3+ < Y3+
(4) Y3+ < Lu3+ < Eu3+ < La3+ Q.118 Which of the following has an optical isomer ?
(5) Eu3+ < La3+ < Lu3+ < Y3+ [AIEEE-2009]
(1) [Co(en)(NH3)2]2+ (2) [Co(H2O)4(en)]3+
Q.112 Which of the following statements is not (3) [Co(en)2(NH3)2]3+ (4) [Co(NH3)3Cl]+
correct - [KERALA PET 2007]
(1) The complexes [NiCl4]2– and [Ni(CN)4]2– differ Q.119 Which of the following pairs represents linkage
in the state of hybridization of nickel isomers ? [AIEEE-2009]
(2) The complexes [NiCl4]2– and [Ni(CN)4]2– differ (1) [Pd (P Ph3)2 (NCS)2] and [Pd (P Ph3)2 (SCN)2]
in the magnetic properties (2) [Co(NH3)5NO3] SO4 and [Co(NH3)5SO4] NO3
(3) The complexes [NiCl4]2– and [Ni(CN)4]2– differ (3) [Pt Cl2 (NH3)4] Br2 and [Pt Br2 (NH3)4] Cl2
in geometry (4) [Cu(NH3)4 [PtCl4]] and [Pt(NH3)4] [CuCl4]
(4) The complexes [NiCl4]2– and [Ni(CN)4]2– differ
in primary valencies of nickel
Q.120 In context with the transition elements, which of
(5) Nickel ion has the same secondary valency in
the following statements is incorrect ?
the complex [NiCl4]2– and [Ni(CN)4]2–
[AIEEE-09]
Q.113 Both Co3+ and Pt4+ have a coordination number of (1) In the highest oxidation states, the transition
six. Which of the following pairs of complexes will metal show basic character and form cationic
show approximately the same electrical conductance complexes.
for their 0.001 M aqueous solutions - (2) In the highest oxidation states of the first five
[KERALA PET 2007] transition elements (Sc to Mn), all the 4s and
(1) CoCl3.4NH3 and PtCl4.4NH3 electrons are used for bonding.
(2) CoCl3.3NH3 and PtCl4.5NH3 (3) Once the d5 configuration is exceeded, the
(3) CoCl3.6NH3 and PtCl4.5NH3 tendency to involve all the 3d electrons in
(4) CoCl3.6NH3 and PtCl4.3NH3 bonding decreases.
(5) CoCl3.5NH3 and PtCl4.6NH3 (4) In addition to the normal oxidation states, the
zero oxidation state is also shown by these
Q.114 Which of the following ions has a magnetic moment elements in complexes.
of 5.93 BM - [KERALA PET 2007]
(1) Mn 2+ (2) Fe2+
Q.121 Knowing that the Chemistry of lanthanoids (Ln) is
(3) Cr 2+ (4) V3+
(5) Cr3+ dominated by its +3 oxidation state, which of the
Q.115 When hydrogen peroxide is added to acidified following statements is incorrect ? [AIEEE-09]
potassium dichromate, a blue colour is produced (1) The ionic sizes of Ln (III) decrease in general
due to formation of - [KERALA PET 2007] with increasing atomic number.
(1) CrO3 (2) Cr2O3 (2) Ln (III) compounds are generally colourless.
(3) CrO5 (4) CrO42– (3) Ln (III) hydroxides are mainly basic in character.
(5) Cr2O7 2–
(4) Because of the large size of the Ln (III) ions the
bonding in its compounds is predominently
ionic in character
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Q.122 Which type of metal form effective catalyst - Q.129 The complex showing a spin-only magnetic moment
[CGPMT 2009] of 2.82 B.M. is [IIT-2010]
(1) Alkali Metal (2) Transition Metal (1) Ni(CO)4 (2) [NiCl4]2–
(3) Alkaline Earth Metal (4) Radioactive Metal (3) Ni((PPh3)4 (4) [Ni(CN)4]2–
Q.123 In solid CuSO4.5H2O, copper is coordinated to
number of water molecule - [CGPMT 2009] Q.130 Which one of the following has an optical isomer?
(1) 5 (2) 4 [AIEEE-2010]
(3) 1 (4) 2 (1) [Zn(en)2]2+ (2) [Zn(en)(NH3)2]2+
(3) [Co(en)3]3+ (4) [Co(H2O)4(en)]3+
Q.124 The species having tetrahedral shape is -
[CGPMT 2009] Q.131 The hybridization in [Co(NH3)6]3+ -
(1) [PdCl4]2– (2) [Ni(CN)4]2– [DPMT-2010]
(3) [Pd(CN)4]2– (4) [NiCl4]2– (1) dsp 3 3 2
(2) sp d
(3) sp3 (4) d2sp3
Q.125 The compound(s) that exhibit(s) geometrical
isomerism is(are) - [IIT-2009]
(1) [Pt(en)Cl2] (2) [Pt(en)2]Cl2 Q.132 Which of the following configuration of ions has
(3) [Pt(en)2Cl2]Cl2 (4) [Pt(NH3)2Cl2] zero CFSE in both strong and weak ligand fields ?
[DPMT-2010]
10 8
Q.126 The spin only magentic moment value (in Bohr (1) d (2) d
magneton units) of Cr(CO)6 is - [IIT-2009] (3) d6 (4) d4
(1) 0 (2) 2.84
(3) 4.90 (4) 5.92 Q.133 Which of the following is diamagnetic in nature?
[DPMT-2010]
Q.127 The ionization isomer of [Cr(H2O)4Cl(NO2)]Cl is - (1) Co3+, Octahedral complex with weak field ligands
(1) [Cr(H2O)4(O2N)] Cl2 [IIT-2010]
(2) Co3+, octahedral complex with strong field
(2) [Cr(H2O)4Cl2] (NO2)
(3) [Cr(H2O)4Cl(ONO)]Cl ligands
(4) [Cr(H2O)4Cl2(NO2)].H2O (3) Co2+ in tetrahedral complex
(4) Co2+ in square planar complex
Q.128 The correct structure of ethylenediaminetetraacetic
acid (EDTA) is - [IIT-2010] Q.134 Which of the following complexes has minimum
HOOC–CH 2 CH2 –COOH magnitude of 0 ? [DPMT-2010]
(1) [Cr(CN)6]3– (2) [Co(NH3)6]3+
(1) N–CH=CH–N
(3) [CoCl6]3– (4) [Cr(H2O)6]3+
HOOC–CH2 CH 2–COOH
Q.135 When of the following ions will give a coloured
HOOC COOH
solutions - [DPMT-2010]
(2) N–CH2–CH2–N (1) Cu+ (2) Fe2+
HOOC COOH (3) Zn2+ (4) Ag+
HOOC–CH 2 CH2 –COOH
Q.136 On adding excess of NH4OH to copper sulphate
(3) N–CH2–CH2–N solution - [DPMT-2010]
HOOC–CH2 CH 2–COOH (1) A deep blue solution is obtained
(2) A blue precipitate of Cu(OH)2 is obtained
COOH (3) A black precipitate of CuO is obtained
HOOC–CH2 CH 2 H (4) No change takes place
(4) N–CH–CH–N
H CH 2 CH 2–COOH
HOOC

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Q.137 In Fe(CO)5, the Fe  CO  bond results by the Q.147 Among the ligands NH3, en, CN– and CO the correct
order of their increasing field strength,
overlap between filled sp hybrid orbital of C-atom is - [AIEEE-2011]
of CO molecule and vacant hybrid orbital of Fe (1) NH3 < en < CN– < CO
atom - [DPMT-2010] (2) CN– < NH3 < CO < en
(1) d2sp3 (2) sp3 (3) en < CN– < NH3 < CO
(3) dsp3 (4) dsp2 (4) CO < NH3 < en < CN–

Q.148 Which one of the following complex ions has

Q.138 The number of unpaired electrons in tetrahedral geometrical isomers ? [AIEEE-2011]
[Ni(CO)4] is - [AMU-2010] (1) [Ni(NH3)5 Br]+ (2) [Co(NH3)2 (en)2]3+
(1) 0 (2) 2 (3) [Cr(NH3)4(en)]3+ (4) [Co(en)3]3+
(3) 3 (4) 4 (en = ethylenediamine)

Q.149 Colourless ion-pair is - [RPMT-2011]

Q.139 AgCl is dissolved in excess of each of NH3, KCN (1) Cu+, Zn2+ (2) Cu2+, Zn2+
and Na2S2O3. The complex ions produced in each (3) V3+, Cr3+ (4) Mn3+, Fe3+
case are - [AMU-2010]
(1) [Ag(NH3)2]+, [Ag(CN)3]+, and [Ag(S2O3)2]3– Q.150 Similar sizes of second and third transition elements
(2) [Ag(NH3)2]2+, [Ag(CN)2]3–, and [Ag2(S2O3)2]2– can be explained on the basis of -
(3) [Ag(NH3)4]2+, [Ag(CN)2]3–, and [Ag2(S2O3)2]2– (1) Inert-pair effect [RPMT-2011]
(4) [Ag(NH3)2]+, [Ag(CN)2]–, and [Ag(S2O3)2]3– (2) Screening effect
Q.140 The most stable complex among the following is - (3) Lanthanide contraction
[AMU-2010] (4) Increasing effective nuclear charge
(1) [Pd(CN)4]4– (2) [Fe(CO)5]
(3) [Ni(CN)4]4– (4) [Ni(CN)4]3– Q.151 A transition metal complex adopts t 42 g eg 2
Q.141 The colour of zinc sulphide is - [MPPMT-2010] configuration. The nature of ligand surrounding the
(1) White (2) Black ion is - [RPMT-2011]
(3) Brown (4) Red (1) Strong field (2) Weak field
Q.142 The formula of mercurous ion is [MPPMT- 2010] (3) Neutral (4) ve field
(1) Hg+ (2) Hg2+
(3) Hg22+ (4) None of these Passage Based : (Q.152 to Q.154) [IIT-2011]
When a metal rod M is dipped into an aqueous
Q.143 Reduction of the metal centre in aqueous
colourless concentrated solution of compound N,
permanganate ion involves - [IIT-2011]
(1) 3 electrons in neutral medium the solution turns light blue. Addition of aqueous
(2) 5 electrons in neutral medium NaCl to the blue solution gives a white precipitate
(3) 3 electrons in alkaline medium O. Addition of aq. NH3 dissolves O and gives an
(4) 5 electrons in acidic medium intense blue solution.
Q.144 Geometrical shapes of the complexes formed by the
reaction of Ni2+ with Cl–, CN– and H2O, respectively,
Q.152 The metal rod M is -
are [IIT-2011]
(1) octahedral, tetrahedral and square planar (1) Fe (2) Cu
(2) tetrahedral, square planar and octahedral (3) Ni (4) Co
(3) square planar, tetrahedral and octahedral
(4) octahedral, square planar and octahedral Q.153 The compounds N is -
Q.145 2–
The magnetic moment (spin only) of [NiCl4] is: (1) AgNO3 (2) Zn(NO3)2
[AIEEE-2011] (3) Al(NO3)3 (4) Pb(NO3)2
(1) 1.82 BM (2) 5.46 BM
(3) 2.82 BM (4) 1.41 BM Q.154 The final solution contains -
Q.146 The outer electron configuration of Gd (Atomic N : (1) [Pb(NH3)4]2+ and [CoCl4]2–
64) is : [AIEEE-2011] (2) [Al(NH3)4]3+ and [Cu(NH3)4]2+
(1) 4f3 5d5 6s2 (2) 4f8 5d0 6s2
(3) [Ag(NH3)2]+ and [Cu(NH3)4]2+
(3) 4f4 5d4 6s2 (4) 4f7 5d1 6s2
(4) [Ag(NH3)2]+ and [Ni(NH3)6]2+

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Q.155 Among the following complexes (K–P)

[IIT-2011] Q.164 WhIch of the following is used to prepare Cl2 gas at
(K) K3[Fe(CN)6], (L) [Co(NH3)6]Cl3, room temperature from concentrated HCl ?
(M) Na3 [Co(oxalate)3], (N) [Ni(H2O)6]Cl2, [WB-JEE-2011]
(O) K2[Pt(CN)4] and (P) [Zn(H2O)6] (NO3)2 the (1) MnO2 (2) H2S
diamagnetic complexes are (3) KMnO4 (4) Cr2O3
(1) K, L, M, N (2) K, M, O, P
(3) L, M, O, P (4) L, M, N, O Q.165 Which of the following represents the composition
of Carnallite mineral ? [WB-JEE-2011]
Q.156 As we move from left to right in the 3d series
(1) K2O.Al2O3, 6SiO2
elements - [COMED-2011]
(1) Electro +ve character decreases (2) KNO2
(2) Electro +ve character increses (3) K2SO4.MgSO4.MgCl1.6H2O
(3) Electro positive ness decreases & electro (4) KCl.MgCl2.6H2O
negative ness increases
(4) Electro positive ness increases & electron
negative ness increses Q.166 Ti3+ transition metal ion is purple in colour while
Ti4+ metal ion is colourless due to :
Q.157 In cuprammonium sulphate, copper is -
(1) Diamagnetic [COMED-2011] [AMU-2011]
(2) Paramagnetic (1) vacant ‘d’ orbitals
(3) Ferromagnetic
(4) Non magnetic (2) unpaired electrons in ‘d’ orbitals
(3) completely filled ‘d’ orbitals
Q.158 The number of ions produced in solution by (4) None of the above
chromium sulphate is- [COMED-2011]
(1) 6 (2) 3 Q.167 Potassium dichromate in acidic solution reacts
(3) 4 (4) 5
with Fe2+ gives : [AMU-2011]
3+ 1+
Q.159 An example for complex anion is - (1) Cr + nH2O (2) Cr + nH2O
(1) Hexa ammino platinum ion [COMED-2011] 2+
(3) Cr + nH2O (4) Cr0 + nH2O
(2) Cuprammonium ion
(3) Ferrocyanide ion
(4) Hexa ammino chromium ion Q.168 Which one of the following is heteroleptic
complex : [AMU-2011]
Q.160 The hybridization of Nickel in Nickel tetracarbonyl 3+
(1) [Co(NH3)6] (2) [Co(CN)6]3–
is - [COMED-2011]
(3) [Co(NH3)4Cl2] (4) [Co(H2O)6]3+
(1) sp3 (2) sp2
(3) dsp2 (4) d2sp3
Q.169 Weak field ligands form high spin complexes due
Q.161 CO ligand is - [COMED-2011] to : [AMU-2011]
(1) Carbonyl (2) Carbonium (1) 0 > P Where 0 is crystal field splitting
(3) Carboso (4) Carbanosium and P = pairing energy
Q.162 Silver is - [COMED-2011] (2) 0 < P
(1) Monovalent (2) Bivalenet (3) 0 = P
(3) Trivalent (4) Tetravalent
(4) 0 = 0
Q.163 Platinum, Palladium and Iridium are called noble
Q.170 Oxides of which metal are used as phosphors in
metals because - [WB-JEE-2011]
(1) Alfred Nobel discovered them television screens and fluorescing surfaces :
(2) They are shining lustrous and pleasing to look [AMU-2011]
at
(3) They are found in native state (1) W (2) Tb
(4) They are inert towards many common reagent (3) Ac (4) All of the above

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CHEMISTRY D & F BLOCKS AND COORDINATION COMPOUNDS CIEL KNOWLEDGE

EXERCISE # 12
These questions consist of two statements each, Q.6 Assertion : KMnO 4 is dark pink coloured
printed as Assertion and Reason. While answering compound.
these Questins you are required to choose any one Reason : In the KMnO4 charge transfer spectrum
of the following four response. occurs.
(A) If both Assertion & Reason ae True & (1) A (2) B
the reason is a correct explanation of (3) C (4) D
the Assertion.
(B) If both Assertion & Reason are true but Q.7 Assertion : Hg is the only metal which is liquid at
Reason is not a correct explanation of 0ºC.
the Assertion. Reason : It has very high IP and weak metallic bond.
(C) If assertion is True but the Reason is (1) A (2) B
False (3) C (4) D
(D) If both Assertion & Reason are False.
Q.8 Assertion : AgI is coloured while AgF is colourless.
Q.1 Assertion : Tetrahedral complex do not exhibit Reason : Unpaired e– is present in AgI.
geomerical isomerism. (1) A (2) B
Reason : In tetrahedral complex all the four positions (3) C (4) D
are identical.
(1) A (2) B Q.9 Assertion : CrCl3.3H2O is non-conductive.
(3) C (4) D Reason : All the three Cl – ions are in the
coordination sphere.
Q.2 Assertion : [Fe(CO)5] is inner orbital complex. (1) A (2) B
Reason : In the given complex oxidation state of (3) C (4) D
Iron is zero.
(1) A (2) B Q.10 Assertion : Ferrocene is -bonded organometalic
(3) C (4) D comound.
Reason : Ferrocene is a sandwitch compound.
Q.3 Assertion : 1st ionisation potential of mercury is (1) A (2) B
greater than cadmium. (3) C (4) D
Reason : Hg has stable electronic configuration (5d10
6s2). Q.11 Assertion : Solution of Na 2CrO4 in water is
(1) A (2) B intensely coloured.
(3) C (4) D Reason : Ox. state of Cr in Na2CrO4 is +6.
(1) A (2) B
Q.4 Assertion : Hexachloroplatinate is a complex anion. (3) C (4) D
Reason : Complex has negatively charged ligands.
(1) A (2) B Q.12 Assertion : NF3 is weaker ligand than N(CH3)3.
(3) C (4) D Reason : NF3 ionises to give F– ions in aqueous
solution.
Q.5 Assertion : Trans [CoCl2(en)2]+ is optically inactive. (1) A (2) B
Reason : It has a plane of symmetry. (3) C (4) D
(1) A (2) B Q.13 Assertion : Lanthanum is d-block element.
(3) C (4) D Reason : Last electron in Lanthenum enters in 5d
orbital.
(1) A (2) B
(3) C (4) D

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Q.14 Assertion : La(OH)3 is more basic than Lu(OH)3. Q.22 Assertion : Oxidation state of Fe in Fe(CO)5 is zero.
Reason : Lanthanum is d-block element. Reason : Synergic bonding takes place in this metal
(1) A (2) B carbonyl complex.
(3) C (4) D (1) A (2) B
(3) C (4) D
Q.15 Assertion : Actinides show much higher range of
oxidation states. Q.23 Assertion : Zeise's salt is a -bonded organometallic
Reason : Energy difference between 5f and 6d compound.
orbitals is large. Reason : Zeise's salt contain C2H4 molecules as one
(1) A (2) B of the ligand.
(3) C (4) D (1) A (2) B
(3) C (4) D
Q.16 Assertion : All the lanthanide elements exhibits a
common oxidation state of +3 in their compounds. Q.24 Assertion : [CoCl3(NH3)3] does not give white
Reason : The atoms of the lanthanide elements precipitate with AgNO3 solution.
contains three electron in their outermost shell. Reason : [CoCl 3(NH3)3] complex is optically
(1) A (2) B inactive.
(3) C (4) D (1) A (2) B
(3) C (4) D
Q.17 Assertion : Potassium ferrocyanide is diamagnetic Q.25 Assertion : Complex ion [Co(NH3)6]2+ is readily
whereas potassium ferricyanide is paramagnetic. oxidized to [Co(NH3)6]3+.
Reason : Crystal field spliting in ferrocyanide ion is Reason : Unpaired electron in complex ion
greater than that of ferricyanide ion. [Co(NH3)6]2+ is present in 4p orbital.
(1) A (2) B (1) A (2) B
(3) C (4) D (3) C (4) D

Q.18 Assertion : K2Cr2O7 is used as a primary standard Q.26 Assertion : Hydrazine is a neutral ligand.
in volumetric analysis. [AIIMS 2006] Reason : It has two N as donor atoms and behaves
Reason : It has a good solubility in water. as a chelating ligand.
(1) A (2) B (1) A (2) B
(3) C (4) D (3) C (4) D

Q.19 Assertion : change in colour of acidic solution of

potassium dichromate by breath is used to test
drunk drivers. [AIIMS 2006]
Reason : Change in colour is due to the
complexation of alcohol with potassium dichromate.
(1) A (2) B
(3) C (4) D

Q.20 Assertion : [Ti(H2O) 6 ] 4+ is coloured while

[Sc(H2O)6]3+ is colourless.
Reason : d-d transition is possible in [Sc(H2O)6]3+.
(1) A (2) B
(3) C (4) D
Q.21 Assertion : [Fe(EDTA)]– complex is octahedral in
shape.
Reason : EDTA is a hexadentate ligand and
undergoing sp3d2 hybridisation.
(1) A (2) B
(3) C (4) D

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ANSWER KEY
Exercise # 1
Ques. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans. 3 2 4 3 2 2 1 2 3 4 1 4 3 4 1 3 2 4 2 2

Exercise # 2
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans . 3 1 3 1 1 3 2 1 1 3 4 4 3 1 3 2 2 2 4 1
Ques . 21 22 23
Ans . 3 3 2

Exercise # 3
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Ans . 3 1 4 3 2 1 1 1 1 4 3 2 4 3 3 3 4 3

Exercise # 4
Ques. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Ans. 3 2 1 4 2 2 1 2 4 3 1 4 1 2 3 2 1 4 3 1 3 1 2 1 3 3
Ques. 27 28 29 30 31 32 33 34 35 36
Ans. 3 1 1 3 2 3 3 2 3 3

Exercise # 5
Q ue s . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans . 4 2 3 1 3 2 2 4 1 3 3 2 4 3 2 4 3 1 2 4
Q ue s . 21 22 23 24 25 26 27 28 29 30 31 32
Ans . 4 4 4 2 4 2 2 3 3 4 4 2

Exercise # 6
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Ans . 1 2 3 4 3 3 4 2 3 1 3 4 1 3

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Exercise # 7
Ques . 1 2 3 4 5 6 7 8 9 10 11 12
Ans . 2 1 4 3 3 3 2 4 1 1 3 4

Exercise # 8
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans . 2 3 3 3 3 4 2 1 3 1 2 3 2 2 1 2 1 3 1 4
Ques . 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Ans . 3 3 1 4 2 3 4 4 2 3 2 4 1 2

Exercise # 9
Ques . 1 2 3 4 5 6 7 8 9 10 11
Ans . 3 2 1 1 1 1 1 3 2 2 4

Exercise # 10
Ques . 1 2 3 4 5 6 7 8 9 10
Ans . 3 3 3 4 3 2 2 1 2 3

Exercise # 11(A)
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans . 3 3 3 4 2 1 4 4 1 1 1 1 1 1 3 3 3 2 4 1
Ques . 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Ans . 3 2 4 2 3 2 1 1 4 3 3 1 3 2 2 3 1 4 2 3
Ques . 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Ans . 1 1 3 4 1 2 4 4 2 1 2 2 4 2 1 3 2 1 4 3
Ques . 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
Ans . 1 3 4 2 1 4 4 3 2 3 2 1 1 1 4 2 3 4 1 3
Ques . 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 1 00
Ans . 2 3 3 4 3 2 4 2 3 1 3 1 2 2 4 2 3 1 1 4
Ques . 10 1 1 0 2 1 03 10 4 1 05 10 6 1 07 1 08 10 9 1 10 11 1 1 12 11 3 1 14 1 15 11 6 1 17
Ans . 4 3 4 1 4 4 2 3 3 2 2 2 2 4 4 3 3

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Exercise # 11(B)
Q ues . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A ns . 4 2 1 2 4 1 4 2 1 3 1 3 1 2 1 2 4 2 3 4
Q ues . 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
A ns . 3 2 4 4 4 1 4 4 2 1 3 2 2 2 3 1 1 2 2 3
Q ues . 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
A ns . 2 4 4 1 2 3 4 1 3 2 2 2 4 4 2 3 4 2 4 1
Q ues . 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
A ns . 3 4 3 3 3 1 1 3 4 4 1 2 1 1 1 1 1 3 1 1
Q ues . 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
A ns . 3 2 3 3 2 4 1 4 2 2 4 4 1 3 2 1 4 2 1 2
Q ues . 10 1 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120
A ns . 1 3 1 4 4 4 2 4 5 2 4 4 3 1 3 4 1 3 1 1
Q ues . 12 1 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
A ns . 2 2 2 4 3 ,4 1 2 3 2 3 4 1 2 3 2 1 3 1 4 2
Q ues . 14 1 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160
A ns . 1 3 1 ,3 ,4 2 3 4 1 2 1 3 2 2 1 3 3 1 2 4 3 1
Q ues . 16 1 162 163 164 165 166 167 168 169 170
A ns . 1 1 3 3 4 1 1 3 2 2

Exercise # 12
Ques . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ans . 1 2 2 2 1 1 1 3 1 2 2 3 1 2 3 3 3 3 3 4
Ques . 21 22 23 24 25 26
Ans . 3 2 1 2 3 3

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