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QUIZ -04 INORGANIC CHEMISTRY

MM : 268 CO-ORDINATION TIME : 60MIN
Marking Scheme :
Q.No. 1 to 33 Single correct answer type, each correct +3marks, incorrect - 1.
Q.No. 34 to 46 Multiple correct answer type, each correct +4marks, incorrect - 2, partial marks allowed.
Q.No. 47 to 55 Comprehension type, each correct +3marks, incorrect - 1.
Q.No. 56 to 61 matrix match type each correct +10marks, +2 for each row, Partial marks allowed.
Q.No. 62 to 71 Integer Answer type +3marks, no negative marking.

SINGLE CORRECT ANSWER TYPE

1. Fe4[Fe(CN)6]3 is a blue coloured complex. Average oxidation number of Fe in Fe4[Fe(CN)6]3 is ‘a’,
oxidation number of central ion atom ‘b’, oxidation number of counter iron atom ‘c’; a, b, c are respec-
tively

5 5 18 18
(A) , 2, 3 (B) , 3, 2 (C) , 2, 3 (D) , 3, 2
2 2 7 7
2. Which among the following statements are true for the complex [Co(NH3)6][Cr(CN)6]?
(1) It is a non-electrolyte
(2) The magnitude of the charge on each complex ion is three
(3) The complex will not conduct current in aqueous solution
(4) The complex will exhibit co-ordination isomerism
(5) The magnitude of the charge on each complex ion is one
(A) 1 and 4 (B) 1 and 3 (C) 3 and 5 (D) 2 and 4
3. Hybridisation of which complex is correctly matched?
(A) AuCl4 -sp3 (B) [Co(oxalato)3]3–-sp3d2
(C) RhCl(PPh3)3-dsp2 (D) [Fe(NH3)6]2+-d2sp3
4. For which of the following complexes total number of stereoisomers is same irrespective of geometry
of complex (C.N. = 4) ?
(A) [M(NH3)2 (Cl) (Br)] (B) [M (gly)2]
(C) [M(NH3)(ph)(Cl)(Br)] (D) [M(NH3)2Cl2]
5. The image on an exposed and developed photography film is due to the formation of
(A) AgBr (B) Ag(S2O3)2]3– (C) Ag (D) Ag2O
6. [Co(NH3)4(NO2)2]Cl exhibits
(A) linkage isomerism, geometrical isomerism and optical isomerism
(B) linkage isomerism, ionization isomerism and optical isomerism
(C) linkage isomerism, ionization isomerism and geometrical isomerism
(D) ionization isomerism, geometrical isomerism and optical isomerism
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7. Complex compound whose central metal is in its +1 oxidation state with co-ordination number two can
show which isomerism?
(A) Ionisation (B) Hydrated (C) Linkage (D) Geometrical
8. Type of isomerism which is shown by [PtCl2Br2]2– is also observed in
(A) [CoCl2Br2]2– (B) [Co(en)3]3+ (C) [PtCl4Br2]2– (D) [PtCl3(NO2)]2–
9. Which of the following has two geometrical isomers and is also a non-ionisable complex?
(A) PtCl4.3NH3 (B) PtCl4.6NH3 (C) PtCl4.2NH3 (D) PtCl4 . 4NH3
10. Which of the following paramagnetic complex of metal in its +2 oxidation state shows
geometrical isomerism?
(A) [Ni(en)3]Cl2 (B) [Co(H2O)5NO2]Cl
(C) [Pt(NH3 )2Cl2 ] (D) [Co(NH3 )4 (H2O)2 ]C12
11. Which species have maximum magnetic moment?
(A) [Cr(H2O)6 ]2+ (B) [Cr(H2O)6]3+ (C) [Mn(H2O)6 ]2+ (D) [CoCl4]2–
12. Which of the following is d2sp3 hybridised?
(A) [NiF6]2– (B) [IrCl6]3– (C)[Co(H2O)6]+3 (D) All
13. In which of the following donation of electron from filled d-orbitals of metal to empty orbitals of ligand
is not observed?
(A) (CH3)2S (B) CN– (C) H2C = CH2 (D) CH3O–
14. Which of the following complexes (Werner presentation) have minimum electrical conductance in
aqueous solution?

NH3 NH3
Cl
– NH3 Cl– –
Cl
3+ 3+
(A) NH3 Co Cl– (B) HN
3 Co
NH3 Cl–
NH3 Cl
– NH3
NH3 NH3

NH3 NH3 –
Cl –
NH3 Cl –
Cl

3+ – 3+
(C) HN
3 Co Cl (D) HN
3 Co
NH3 Cl–
NH3 –
Cl NH3

15. Metal which is present in haemoglobin is also present in:

(A) Tollens' reagent (B) Vitamin B12
(C) cis-platine (D) sodium nitroprusside
16. Which of the following have maximum magnetic moment (spin only)?
(A) K3[Fe(CN)6] (B)[FeCl4]2– (C)[Fe(H2O)6]Cl3 (D) [FeF6]4–
CHEMISTRY /QUIZ 2
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17. Select correct about PtCl4.4NH3 complex salt:
I. All the chlorides are bonded by primary valency.
II. All the chlorides are bonded by secondary valency.
III. All the NH3 are bonded by secondary valency.
IV. Half of the chlorides are bonded with secondary valency.
(A) I, III (B) I, III, IV (C) II, III (D) Only III
18. Which of the following cobalt (III) complex is paramagnetic, high spin complex?
(A) [Co(H2O)6]+3 (B) [Co(C2O4)3]–3 (C) [Co(CN)6]3– (D) None of these
19. For which of the following complexes central metal does not use d-orbital(s) for hybridisation ?
(A)[Ni(CN)4]4– (B)[Ni(NH3)6]2+ (C)[Cu(NH3)4]2+ (D)[Fe(CN)6]3–
20. Which of the following is the correct structure of dien (diethylenetriamine) ?
(A) NH2—(CH2)2—NH—(CH2)2—NH2 (B) NH2—CH2—NH—CH2—NH2

(C) H2N—CH=CH—NH—CH=CH—NH2 (D) CH 2 CH 2 CH CH 2

| | |
NH2 NH2 NH2

21. Which of the following ligands does not form metal-nitrogen bond when bonded with metal?
(A) EDTA4– (B) en (C) Gly1– (D) acac1–
22. As compared to CO, CN– ligand is a :
(A) strong -donar, weak -acceptor (B) weak -donar, strong -acceptor
(C) strong -donar, strong -acceptor (D) weak -donar, weak -acceptor
23. Which of the following ligands is ambidentate as well as chelating ligand?

(A) (B) NCS–

N N

COO– O O
(C) CH2 (D)
NH2 S S

24. Which of the following compound is not coloured?

(A) Na2 [CuCl4 ] (B) Na2 [CdCl4 ] (C) Fe4[Fe(CN6)]3 (D) None
25. Which of the following pairs of molecule have identical shape?
(A) [NiCl4]2– and XeF4 (B) [Zn(H2O)4]2+ and SiCl4
(C) [Fe(CO)5 ] and XeOF4 (D) [Ag(NH3)2]+ and SF2
26. Which of the following has the highest molar conductivity under similar conditions?
(A) Diamminedichloroplatinum(II) (B) Tetraamminedichlorocobalt(III) chloride
(C) Potassium hexacyanoferrate(II) (D) Hexaaquachromium(III) chloride
27. In nitroprusside ion, the iron and NO exist as FeII and NO+ rather than FeIII and NO. These forms can be
differentiated by :
(A) estimating the concentration of iron (B) measuring the concentration of CN–
(C) measuring the solid state magnetic moment (D) thermally decomposing the compounds
CHEMISTRY /QUIZ 3
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28. Select the correct statement.

(A) Complex ion [MoCl6]3– is paramagnetic (B) Complex ion [Co(en)3]3+ is diamagnetic
(C) Both are correct (D) None of the above is correct
29. Which line of properties A, B, C or D correctly lists properties of the given three complexes ?
[Ni(CN)4]2– [Ni(Cl)4]2– [Ni(CO)4]0

(A) Square planar Paramagnetic = 8 B.M.

(B) =0 Tetrahedral Diamagnetic

(C) Diamagnetic = 8 B.M. Square planar

(D) Square planar Diamagnetic Ni in sp3 –

hybridisation
30. Which of the following complexes is optically inactive but its other geometrical isomers is optically
active ?
(A) Trans dicyano bis(ethylenediamine)cobalt(III) nitrate
(B) Mer-triamminetrichloridoplatinum(IV) chloride
(C) Cis-diamminedinitrito-O platinum(II)
(D) Trans-tetraamminedichloridocobalt(III) bromide
31. Which of the following is incorrectly matched complex ?
Complex Oxidation number Electronic configurattion

(A) K3[Co(C2O4)3] +3, t 62g e g0

(B) (NH4)2[CoF4] +2, t 52g e g2

(C) Cis-[Cr(en)2Cl2]Cl +3, t 32g e g0

(D) [Mn(H2O)6]SO4 +2, t 32g e 2g

32. A complex cation is formed by Pt (in some oxidation state) with ligands (in proper number so that co-
ordination number of Pt becomes six). Which of the following can be its correct IUPAC name ?
(A) Diammineethylenediaminedithiocyanato-S platinum(II)
(B) Diammineethylenediaminedithiocyanato-S platinate(IV) ion
(C) Diammineethylenediaminedithiocyanato-S platinum(IV) ion
(D) Diammine bis(ethylenediamine)dithiocyanato-S platinum(IV) ion
33. Which of the following complexes exhibits the highest paramagnetic behaviour ?
(A) [Co(ox)2(OH)2]– (B)[Ti(NH3)6]3+
(C) [V(gly)(OH)2 (NH3)2]+ (D) [Fe(en)(bipy)(NH3)2 ]2+

CHEMISTRY /QUIZ 4
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MULTIPLE CORRECT ANSWER TYPE

34. Co-ordination isomerism is possible in :
(A)[Ag(NH3)2][Ag[CN)2] (B)[Pt(en)2][PtCl4]
(C)[Pt(NH3)4][Pt(C2O4)2] (D)[Pt(NH3)4][PtCl6]

35. Optically inactive and diamagnetic complex of cobalt which have 1 : 3 : 3 ratio of Co, NH3 and NO 2 :

(A) Hexaamminecobalt(III) hexanitrito-Ncobaltate(III)

(B) Fac-triamminetrinitrito-Ncobalt(III)
(C) Pentaamminenitrito-Ncobalt(III) hexanitrito-Ncobaltate(III)
(D) Hexaamminecobalt(III) diaamminetetranitrito-Ncobaltate(III)
36. In which case EAN value is satisfied?
(A)[Fe( 5C5H5)2] (B) [Ni(DMG)2] (C)[Mn2(CO)10] (D)[Mn(CO)5]–
37. Which of the following is coloured d0 ion, tetrahedral and d3s -hybridisation ?

(A) CrO24 (B) MnO4 (C) MnO24 (D) [Zn(NH3)4]2+

38. If for a complex [Pt(NH3)6]C14 the ligand substitution reaction is carried out with ethylenediammine
(excess) then which of the following statements is/are correct?
(A) The ultimate product complex can exhibit G.I.
(B) The ultimate product exhibit optical isomerism
(C) Out of the first and second intermediate products of successive substitution only first is optically
active
(D) One of the intermediate products can exhibit G.I.
39. In which of the following Hund's rule is violated ?

(A) Atomic nitrogen =

1s 2s 2p

(B) Molecular diboron = KK, 2s , 2s , 2py = 2pz , 2px

(C) Fe(III) in [Fe(CN)6]3–

(D) Cr(III) in [Cr(NO2)6]3–

40. Which of the following has/have three isomers: (including geometrical, optical, ionisation,
hydrated, linkage isomerism) ?
(A) [Zn(NH3)(H2O)ClBr] (B) [Cr(NH3)4(H2O)Cl]Br
(C) [Cr(NH3)5Cl]NO2 (D) K3[Co(C2O4)3]
41. Select paramagnetic molecule(s)
(A) KO2 (B) cis-[Cr(en)2Cl2]Cl
(C) K3[Co(C2O4]3] (D) [CoCl4]2–
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42. A complex has the empirical formula CoCl3.6H2O. Which of the following statement(s) is/are cor-
rect?
(A) It can exhibit hydrate as well as co-ordination isomerism
(B) All the hydrate isomers are electrical conductor in aqueous solution
(C) One of the hydrate isomer can exhibit geometrical isomerism
(D) The hydrate isomers which can exist in fac-mer isomeric form have the max
for d-d transition
43. Compound [Co(en)2(NO2)C1]SCN has :
(A) three ionisation isomeric form (B) two linkage isomeric form
(C) two geometrical isomeric form (D) three stereoisomers
44. Which of the following properties is/are same in:
(I) [CrCl6]3– (II) [Cr(H2O)6]3+ (III)[Cr(NH3)6]3+ (IV)[Cr(NO2)6]3–
(A) Magnetic moment (B) EAN of central metal
(C) Magnitude of splitting energy (D) Identical metal ligand linkage
45. A compound has magnetic moment 1.73 B.M. Select the possible configuration of central metal and
geometry.
(A) d7 octahedral, low spin (B) d9 tetrahedral
(C) d5 octahedral, low spin (D) d9 square planar
46. Complex in which co-ordination isomerism is possible :
(A) [Ag(NH3)2 ][Ag(CN)2] (B) [Pt(NH3)4 ][Pt(C2O4)3]
(C) [Pt(en)2 ][Pt(C2O4 )3] (D) [Ni(en)3 ][Ni(EDTA)]

COMPREHENSION TYPE
Paragraph for question no.47 to 49
0.01 mole of each complex P and Q (isomer of P) dissolve in separate beaker to prepare 1 litre solution
and passed through acidic cation exchanger. Moles of NaOH required for neutralization is same for both
resulting solution.
47. P and Q are respectively :
(A) [Pt(NH3)4C12]Br2; [Pt(NH3)4Br2]Cl2 (B) [CoCNH3)5SO4]Cl; [Co(NH3)5Cl]SO4
(C) [Cr(NH3)5NO3]Br; [Cr(NH3)5Cl]NO3 (D) [Co(H2O)6]C13; [Co(H2O)4Cl2]C1 . 2H2O
48. P and Q are respectively :
(A) Linkage isomers (B) Ionization isomers (C) Hydrated isomers (D) Geometrical isomers
49. Select correct statement about complex P.
(A) P is a paramagnetic complex
(B) Complex P can show ionization, geometrical and optical isomerism
(C) Solution P does not produce ppt. with AgNO3
(D) Resulting solution of complex P required 0.02 moles KOH for neutralization

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Paragraph for question no.50 to 52

In hydrated isomers, water is interchanged between the complex and the rest of the compound. The
classical example of hydrate isomerism is that of the different hydrated chromium (III) chloride of the
composition CrCl3 . 6H2O.
50. Total structural isomeric complex salt isolated having formulaCrCl3 . 6H2O:
(A) 4 (B) 2 (C) 3 (D) 5
51. Different hydrated isomers of CrCl3 . 6H2O cannot be differentiated by :
(A) conductivity measurements (B) precipitation by AgNO3
(C) dipole moment (D) magnetic moment

52. A complex of metal ion M2+ with d8 configuration having molecular formula MII . 4py . 2NO3 . 2H2O
exists in different isomeric forms, all of which show electrical conductivity in water :
(A) Diamagnetic isomer has sp3d2 -hybridisation
(B) Complex, which loses all water content over cone. H2SO4, has sp3 -hybridisation
(C) Isomer, which shows geometrical isomerism, has square planar geometry
(D) Isomer, which loses no water content over conc. H2SO4, has octahedral geometry
Paragraph for question no.53 to 55
One pink solid has the formula CoCl3 . 5NH3 . H2O. A solution of this salt is also pink and rapidly gives
three mol white ppt. on titration with excess of silver nitrate solution. When the pink solid is heated, it
loses 1 mole H2O to give a purple solid with the same ratio of NH3 : C1 : Co as in pink solid. The purple
solid releases two of its chloride ions rapidly.
53. Which of the following products are formed when pink solid reacts with AgNO3 ?
(A) [Co(NH3)5NO3](NO3)2 + 3AgCI (B) [Co(NH3)5(H2O)][(NO3)3 + 3AgCl
(C) [Co(NH3)5Cl](NO3)2 + 2AgCl (D) [Co(NH3)5Cl](NO3)3 + 2AgCl
54. Select correct statement.
(A) Pink solid shows geometrical isomer
(B) Purple solid shows geometrical isomer
(C) Pink solid and purple solid are hydrated isomer of each other
(D) Pink solid is diamagnetic
55. If one of the Cl atom in co-ordination sphere is replaced by Br atom, then which of the following
statements is correct regarding the compound formed ?
(A) Change in magnetic moment is observed
(B) Number of ions remain same in solution phase
(C) Will give pale yellow ppt. rapidly with AgNO3 solution
(D) Is the ionization isomer of corresponding reactant

CHEMISTRY /QUIZ 7
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MATRIX MATCH TYPE
56. The complex given in List-I show missing digit in its formula, which is given in List-II. Match List-I
with List-II:
List-I List-II
(P) Kn[Fe(CN)6] (Diamagnetic) (1) (n = two)
(Q) [Ag(CN)n]– (2) ( n = three)
(R) Facial - [PtCl3Brn]2– (3) ( n = four)
(S) [Pt(NH3)n]C14 (Octahedral) (4) ( n = six)
Select correct code of your answer :
P Q R S
(A) 4 1 2 3
(B) 3 1 2 4
(C) 2 1 3 4
(D) 1 3 2 4
57. Complex ion given in List-I have definite geometry and contain unpaired electron e– (If any) given in
List-II. Match and select correct code for your answer.
List-I List-II
(P) [ZnCl4]2– (1) Tetrahedral
(Q) [CuCl4]2– (2) Sq. planar
(R) [MnCl4]2– (3) One unpaired electron
(S) [PtCl4]2– (4) Five unpaired electrons
P Q R S
(A) 2 1 4 2
(B) 1 2 4 3
(C) 3 1 1 2
(D) 1 3 4 2
58. Match the Matrix.
Column-I Column-II
(A) Mn2(CO)10 (P) EAN of metal = 36
(B) Fe(CO)5 (Q) Diamagnetic
(C) Cr(CO)6 (R) M—M (Metal to Metal) linkage is present
(D) Co2(CO)8 (S) Metal is in zero oxidation state
(T) Bridging carbonyl group is present
59. Match the Matrix.
Column-I Column-II
(Species) Column-ll (Characteristics/features)
(A) Sodium tetracyanidonickelate(0) (P) Ambidentate ligand
(B) Bis-(ethylenediamine)dithiocyanato- (Q) Multidentate ligand
Ncobalt(lll) sulphate
(C) Tris(ethylenediamine)cobalt(IIl) (R) Complex sphere is anionic
sulphate
(D) Pentaamminesulphatocobalt(III) (S) White ppt. with BaCl2(aq.)
hexanitrito-Ocobaltate(III) (T) Monodentate ligand
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60. Match the Matrix.
Column-I Column-II
(A) [M(H2O)6]±n (P) If M = Fe2+ compound is diamagnetic
(B) [M(NH3)6]±n (Q) If M = Fe3+ compound is paramagnetic
(C) [MCl6]±n (R) If M = Cr3+ compound is paramagnetic
(D) [M(CN)6]±n (S) If M = Co3+ compound is diamagnetic
(T) If M = Pt+4 compound is diamagnetic
61. Match the Matrix.
Column-I Column-II
(A) K[Cr(H2O)2(C2O4)2] (P) Ionization isomerism
(B) [Co(en)3]Cl3 (Q) Linkage isomerism
(C) [Co(NH3)5NO2](NO3)2 (R) Optical isomerism
(D) [Pt(NH3)(H2O)(Cl)2] (S) Geometrical isomerism
(T) Paramagnetic complex

INTEGER
62. For the complex compound [Pt(NH3)(NO2)py(ONO)], total number of geometrical isomers will be :
63. For d6 ion in octahedral field in strong field ligand, what is the number of extra electron pair(s) with
respect to free metal ion?

64. Out of 3dxy, 3dyz, 3dxz, 3d x 2 y2

, 3d z2 five orbitals of Mn2+ total number of 3d-orbitals which points
towards the ligands (Cl–) in complex ion [MnCl4 ]2–, is:
65. Complex compound [Co(NH3)3 (NO2)2C1]° has X geometrical isomers and Y optical isomers. The
value of X is first digit and value of Y is second digit of your answer like XY.
66. The number of isomers possible for complex K2 [PtClBr2SCN]:
67. Below is drawn a neutral coordination compound of the metal niobium, Nb. Find total possible enantio-
meric pair(s) of complex having same molecular formula-

68. Na2[Cr(NO)(NH3)(C2O4)2], given 3 B.M. Find sum of electron(s) in d x 2 y2

and d z2 orbitals of
metal.
69. What is the difference of the number of unpaired electrons between Zn2+ and [Zn(NH3)4]2+?
70. Find the total number of unpaired electrons in t2g orbitals of central atom [CoF6]3–.
71. Find the number of complexes which is/are diamagnetic in nature
[Pt(NH3)4]Cl2, [Ni(NH3)6]SO4, K4[Fe(NO2)6], [Cu(H2O)4]SO4 . H2O, K2[MnCl4].[Cu(NH3)4]SO4,
K3[Cu(CN)6]

CHEMISTRY /QUIZ 9
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ANSWER KEY
1. (C) 2. (D) 3. (C) 4. (B) 5. (C) 6. (C)
7. (C) 8. (C) 9. (C) 10. (D) 11. (C) 12. (D)
13. (D) 14. (D) 15. (D) 16. (C) 17. (B) 18. (D)
19. (A) 20. (A) 21. (D) 22. (A) 23. (D) 24. (B)
25. (B) 26. (C) 27. (C) 28. (C) 29. (B) 30. (A)
31. (B) 32. (C) 33. (A) 34. (D) 35. (A)(B)(C)(D)
36. (A)(C)(D) 37. (A)(B) 38. (B)(D) 39. (A)(B)(D) 40. (B)(C) 41. (A)(B)(D)
42. (A)(C)(D) 43. (A)(B)(C)(D) 44. (A)(B) 45. (A)(B)(C)(D)
46. (B)(C) 47. (A) 48. (B) 49. (D) 50. (A) 51. (D)
52. (D) 53. (B) 54. (D) 55. (B) 56. (B) 57. (D)
58. (A)- (P,Q,R,S); (B)- (P,Q,S); (C)- (P,Q,S); (D)- (P,Q,R,S,T)
59. (A)- (P,R,T); (B)- (P,Q,S,T); (C)- (Q,S); (D)- (P,R, T)
60. (A)- (Q,R,S, T); (B)- (Q,R,S,T); (C)- (Q,R,S, T); (D)- (P,Q,R,S,T)
61. (A)- (R,S,T); (B)- (R); (C)- (P,Q); (D)- (S) 62. (3) 63. (2) 64. (0)
65. (30) 66. (4) 67. (6) 68. (0) 69. (0) 70. (2)
71. (2)

CHEMISTRY /QUIZ 10