(1) The K.E.
of all emitted electrons is hν
(2) The K.E. of all emitted electrons is h(ν–ν0)
(3) The K.E. of fastest electron emitted is h(ν–ν0)
(4) The K.E. of all emitted electrons is hν0
CHEMISTRY
1) The correct formula of
Diamminedichlorodicyanochromate(III) ion is :-
+3
(1) [CrCl3(CN)(NH3)2]
+3
(2) [CrCl(CN)3(NH3)2]
+3
(3) [CrCl(CN)(NH3)4]
–
(4) [CrCl2(CN)2(NH3)2]
2) Which of the following complex compound shows minimum paramagnetism :-
2+
(1) [Cr(H2O)6]
2+
(2) [Mn(H2O)6]
2+
(3) [Fe(H2O)6]
2+
(4) [Ni(H2O)6]
3) Match Column-I with Column-II and select the correct answer with respect to hybridisation using
the codes given below :
Column-I Column-II
(Complex) (Hybridisation)
(I) [PtCl4]–2 (p) dsp2 hybridisation
(II) [Cu(CN)4]3– (q) sp3 hybridisation
3–
(III) [Co(C2O4)3] (r) sp3d2 hybridisation
2+
(IV) [Fe(H2O)5NO] (s) d2sp3 hybridisation
Codes :
(I) (II) (III) (IV)
(1) q p r s
(2) p q s r
(3) p q r s
(4) q p s r
(1) 1
(2) 2
(3) 3
(4) 4
4) The total number of structural isomers of the compound [Cu (NH3)4] [PtCl4] are
(1) 3
(2) 4
(3) 5
(4) 6
5) Which among the following reacts with steam?
(1) Sn
(2) Ge
(3) C
(4) Si
6) Assertion (A) : Reducing property of dioxide decreases as SO2 > SeO2 > TeO2.
Reason (R) : SO2 is oxidising while TeO2 is reducing agent.
(1) Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
(2) Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
(3) Assertion is True but the Reason is False.
(4) Both Assertion & Reason are False.
7) How many statements(s) is/are correct ?
(a) CuSO4 when dissolves with excess KCN gives soluble complex of K3[Cu(CN)4]
(b) Catalytic activity of transition elements is due to its ability to adopt variable oxidation states.
(c) Shielding power of 4f electrons is quite weak.
(d) Ce(IV) solutions are widely used as oxidising agent in volumetric analyses
(1) 1
(2) 2
(3) 3
(4) 4
8) If HCl is not added before passing H2S in the second group, it may result in the :
(1) incomplete precipitation of second group sulphide
(2) precipitation of sulphides of cations belonging to subsequent groups
(3) precipitation of sulphur
(4) precipitation of lead as lead sulphide
9) Assertion : Test of NH4+ cannot be done within group analysis.
Reason : During group analysis several times NH4+ compound is added at the different steps.
(1) Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
(2) Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
(3) Assertion is True but the Reason is False.
(4) Both Assertion & Reason are False.
10) In which of the following M–C bond strength is maximum ?
(1) [Ni(CO)4]
–
(2) [Co(CO)4]
–2
(3) [Fe(CO)4]
(4) Equal in all
11) In which of the following Δ0 < P ?
+3
(1) [Ir(NH3)6]
+3
(2) [Co(NH3)6]
+2
(3) [Cr(NH3)6]
+2
(4) [Fe(NH3)6]
12) Which of the following statement is incorrect ?
(1) Actinoids metals are all silvery in appearance.
(2) Actinoids are not affected by HCl
(3) The magnetic properties of the actinoids are more complex than these of the lanthanoids.
(4) The action of boiling water on actinoids gives a mixture of oxide and hydride.
13) Select the correct order of solubility :-
(1) K2S > BaS > NiS
(2) K2S > NiS > BaS
(3) NiS > BaS > K2S
(4) NiS > K2S > BaS
14) For which of the following element value is more negative than expected due to high
negative hydration enthalpy ?
(1) Mn
(2) Ni
(3) Cu
(4) Zn
15) Which of the following will not liberate hydrogen gas from a dilute acid ?
(1) Ti+2
(2) V+2
(3) Cr+2
(4) Mn+2
16)
In the reaction
2-Butene
(B) is :-
(1) Butane
(2) 1-Butene
(3) Butyraldehyde
(4) Butanone
17) What is the major product of the following reaction ?
(1)
(2)
(3)
(4)
18) In the chemical reaction
What is the structure of B :-
(1) CH3–NH2
(2) CH3–NH–CH3
(3)
(4) CH3–CH2–CH3
19) The reaction of chloroform with alc.KOH and p-toluidine(p-Aminotoluene) forms.
(1)
(2)
(3)
(4)
20)
(P) is ?
(1)
(2)
(3)
(4)
21) Which of the following reagents can distinguish 4-oxopentanoic acid from 2-oxopentanoic acid ?
(1) NaHCO3
(2) 2,4-Dinitrophenylhydrazine
(3) AgNO3, aq. NH3
(4) I2, NaOH
22) Most reactive towards HCN is :-
(1)
(2)
(3)
(4)
23) X & Y respectively is -
(1) CH3MgX and C2H5OH
(2) SnCl2 + HCl and CH3MgX
(3) CH3MgX and SnCl2 + HCl
(4) SnCl2 + HCl and Na + C2H5OH
24) Which of the following intermediate is more stable:-
(1)
(2)
(3)
(4) All are equally stable
25) In the reaction sequence :-
A, B and C are given by the set :-
(1) CH3CH2CHO,CH3CH2CH2Cl,CHI3
(2)
CH3COCH3, , CHI3
(3)
CH3COCH3, ,CHI3
(4)
CH3CH2CHO, ,CHI3
26) For which of the following order is incorrect?
(1) Leaving group ability
(2) Nucleophilicity in polar protic solvent
(3) Nucleophilicity in polar aprotic solvent
(4) Both (2) and (3)
27) Which of the following is incorrect order for leaving group ability in Nucleophilic
substitution reaction ?
(1)
(2)
(3)
(4)
28)
Which is wrongly match
Distinguish
Pair
Reagent
Methyl Alcohol
(1) I2 + Base
and Ethyl Alcohol
Fehling
(2) and Solution
CH3CHO
Phenol and
(3) NaHCO3
Carboxylic Acid
Propane-1-Amine Hinsberg
(4)
and propane-2-Amine reagent
(1) 1
(2) 2
(3) 3
(4) 4
29) In carius method 0.099 gm organic compound gave 0.287 gm AgCl. The percentage of chlorine
in the compound will be ?
(At. Wt. Ag = 108, Cl = 35.5)
(1) 28.6
(2) 35.5
(3) 71.7
(4) 64.2
30) For the estimation of nitrogen, 1.4g of an organic compound was digested by Kjeldahl method
and the evolved ammonia was absorbed in 120 mL of sulphuric acid. the unreacted acid required
20 mL sodium hydroxide for complete neutralization. The percentage of nitrogen in the
compound is ?
(1) 6 %
(2) 3 %
(3) 5 %
(4) 10 %
31) Consider the reaction
If the rate of appearance of CO2 is 0.40 mol/L- sec., the rate of disappearance of O2 is–
(1) 10 mol/L- sec.
(2) 0.90 mol/L- sec
(3) 0.60 mol/L- sec
(4) 0.3 mol/L- sec
32) The rate law for the reaction A+ B → C is : Rate = k[A] [B]1/3 . If the concentration of B is
increased by eight times while that of A is reduce to half then the rate of reaction becomes :
(1) Twice
(2) Thrice
(3) No change
(4) Half
33) For an elementry reaction, A(g) → 2B(g) + C(g), the half life period is 15 minutes. In what period
of time the concentration of A will be reduced to 10% of original concentration ?
(1) 25 minutes
(2) 33 minutes
(3) 67 minutes
(4) 50 minutes
34) For a reaction, graph plotted between lnk vs has a slope of –2 × 104 then activation energy is-
[in kJ/mol] (R = 8⋅3 J × K–1 × mol–1)
(1) 83
(2) 166
(3) 249
(4) 332
35)
For the reaction, 2NO + Br2 → 2NOBr
completes in several steps:
Step I : NO + Br2 NOBr2 (Fast)
Step II : NOBr2 + NO 2NOBr (Slow)
Find rate law.
(1)
r= [NO]2 [Br2]1
(2)
r= [NO]1[Br2]2
(3) r = k3[NO][NOBr2]
(4)
r= [NO]2 [Br2]1
36) An electrolytic cell contains an aqueous solution of Ag2SO4 and has platinum electrodes. A
current is passed until 1.6 g of O2 has been liberated at anode. The amount of silver deposited at
cathode will be :-
[At mass of Ag = 108]
(1) 108 g
(2) 1.6 g
(3) 0.8 g
(4) 21.60 g
37)
The cell reaction for the given cell is spontaneous if :
(1) P1 > P2
(2) P1 < P2
(3) P1 = P2
(4) P2 = 1 atm
38) What will be the molar conductance (in ohm–1 cm2 mol–1) at infinite dilution for NH4OH, if at
infinite dilution the molar conductances of Ba(OH)2, BaCl2 and NH4Cl are 523.28, 280.0 and 129.8
ohm–1 cm2 mol–1 respectively.
(1) 502.88
(2) 373.08
(3) 251.44
(4) 226.96
39) Assertion (A) :- For mercury cell, the cell potential is approximately 1.35 V and remains
constant during its life.
Reason (R) :- The overall cell reaction of mercury cell does not involve any ion in solution whose
concentration can change during its life time.
(1) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(2) (A) is correct but (R) is not correct
(3) (A) is incorrect but (R) is correct
(4) Both (A) and (R) are correct and (R) is the correct explanation of (A)
40) On electrolysis of aqueous solution of KI in presence of platinum electrodes –
(a) Hydrogen gas is released at cathode.
(b) Oxygen gas is released at anode.
(c) pOH of solution decreases.
(d) There is deposition of potassium at cathode.
Choose the correct option from following
(1) a, b
(2) only a
(3) a, c
(4) a, c, d
41) What will be the molality of 2M H2SO4 solution having density 1.8 g/ml :-
(1) 3 m
(2) 1.25 m
(3) 2.4 m
(4) 4.8 m
42) The mass of solute ‘A’ (mol mass = 40 g mol–1) that should be added to 180 g of pure water in
order to lower its vapour pressure to 4/5th of its original value :-
(1) 187.5 g
(2) 90 g
(3) 150 g
(4) 100 g
43) At 27°C, the vapour pressure of pure liquid P is 70 torr. The vapour pressure of the solution of
liquids P and Q is 84 torr and mole fraction of Q is 0.2. The vapour pressure of pure liquid Q is :-
(1) 14 torr
(2) 140 torr
(3) 56 torr
(4) 70 torr
44) A gas X is dissolved in water at 2 bar pressure. Its mole fraction is 0.02 in solution. The mole
fraction of water when the pressure of gas is doubled at the same temperature is :
(1) 0.96
(2) 0.04
(3) 0.02
(4) 0.98
45) A 5% solution (by mass) of glucose in water has freezing point of 270 K. Calculate the freezing
point of 5% cane sugar in water if freezing point of pure water is 273.15 K?
(1) 272 K
(2) 271.5 K
(3) 274.5 K
(4) 280 K
