20120923 chemistry sms

XII(SMS) RT-5 [JEE Mains] Page # 1

CHEMISTRY

XII-SMS REVIEW TEST-5 DATE : 23.09.2012

PART-A[SINGLE CORRECT CHOICE TYPE]

Q.1 to Q.33 has four choices (A), (B), (C), (D) out of which ONLY ONE is correct.

Q.1 Which of the following oxide is more basic among them.

(A*) Al2O3 (B) CO2 (C) B2O3 (D) N2O5

Q.2 Which of the following is exothermic process:

(A)

2)g()g( SS (B*)

)g()g( ClCl

(C) )g()g( NeNe (D) 2

)g()g( NaNa

Q.3 H� O � C �CH �CH2 3

O

& CH � C � O 3 3�CH

O

are(A) Metamer (B*) Functional isomers(C) Chain isomer (D) Positional isomers

Q.4 Correct order of acidic streagth of following compounds is

OH

NO2

OH

NO2

OH

NO2O2N

NO2

OH

NO2

(I) (II) (III) (IV)

(A) III > I > II > IV (B) IV > I > II > III(C*) III > II > I > IV (D) III > IV > I > II

Q.5 2 mole of equimolar mixture of Na2C2O4 and H2C2O4 required V1litre of 0.1 M KMnO4 in acidic

medium for complete oxidatinon. The same amount of the mixture required V2 litre of 0.2 M NaOH for

neutralization. The ratio of V1 to V2 is

(A) 1 : 2 (B) 2 : 1 (C*) 4 : 5 (D) 5 : 4

Sol. eq. of Na2C2O4 + eq. of H2C2O4

= eq. of KmnO4 = V × 0.1 × 5

2 + 2 = 0.5V; V = 8L

eq. of H2C2O4 = eq. of NaOH

1 × 2 = 0.2 × V2; V2 = 10L

Hence, V1 : V2 = 8 : 10 = 4 : 5


CHEMISTRYQ.6 The vapour pressure of water at 80ºC is 355 mm of Hg. 1L vessel contains O2 at 80ºC, saturated with

water the total pressure being 760 mm of Hg. The contents of the vessel were pumped into 0.3 L vessel

at the same temperature. What is the partial pressure of O2 in mm of Hg?

(A*) 1350 (B) 2178.3 (C) 121.5 (D) 355

Sol. Volume of O2 = 1L

and 2Op = 760 � 355 = 405 mm Hg

Since, the temperature is constant, using Boyle's law we get

1L × 405 mm º 0.3 L × 2O'p

2O'p = 1350 mm Hg.

Q.7 Correct order of basic strength of following compounds

N

HN

NH2

(I) (II) (III)

(A) I > II > III (B) III > III > I

(C) II > I > III (D*) II > III > I

Q.8. Which of the following can not show G.I ?

(A) (B*)

(C) (D)

Q.9 Which of the following is incorrect order :

(A) BeO < MgO < CaO : Order of basic nature.

(B*) LiF < LiCl < LiBr < LiI : Order of melting point.

(C) KO2 < RbO2 < CsO2 : Order of thermal stability.

(D) GeCl2 < SnCl2 < PbCl2 : Order of thermal stability.

Q.10 Which of the following is correct statement about the ammonia:

(A) It formed by the decomposition of metal azide.

(B) It's aqueous solution gives deep blue colour with AgCl.

(C) Its decomposition into N2 & H2 is an exothermic process.

(D*) Solution of sodium in liquid ammonia is blue coloures.


CHEMISTRY

Q.11 I2 (aq) + I� (aq) 3I (aq). We started with 1 mole of I2 and 0.5 mole of I� in one litre flask. After

equilibrium is reached, excess of AgNO3 gave 0.25 mole of yellow precipitate. Equilibrium constant is:

(A*) 1.33 (B) 2.66 (C) 2.0 (D) 3.0

Q.12 What is [Ag+] in a solution made by dissolving both AgX and AgY until saturation is reached with respect

to both salts.

ksp (AgX) = 10�11 ksp (AgY) = 9 × 10�11

(A) 10�4M (B) 10�6 M (C) 10�10 M (D*) 10�5 M

Q.13 Which of the following compounds is not aromatic?

(A) (B) (C*) (D)

Q.14 Which of the following cations is most stable?

(A)

CH3

C

H C3

CH3 (B)

CH3

C

H C3

CH3

OH

(C*)

CH3

C

HO

CH3 (D)

CH3

C

H C3OH

Q.15 Which of the following species can acts as a reducing agent.

(A*) I� (B) CrO3 (C) 463Eu (D) Pb4+

Q.16 Which of the following elements are generally known as heavy metals.

(A) Elements of 3d-series (B*) Elements of 5d-series

(C) Alkali metals (D) Alkaline earth metals.

Q.17 Find the log of equilibrium constant K [log10K], for the reaction at 298 kelvin.

2H+(aq) + D2(g) H2(g) + 2D+(aq)

Given o

D/D 2E = �2.955 × 10�3V

Use

0591.0

F

303.2RT

(A*) 0.1 (B) 0.2 (C) 1 (D) 2


CHEMISTRY

[Sol. ocellE = 0.002955 =

2

0591.0 log K ; log K = 0.1]

Q.18 The wave number of third emission line in the atomic spectrum of hydrogen in Balmer series is equal to

[Given R is Rydberg's constant]

(A) cmR7

144(B)

1cm144

R7 (C) cm

R21

100(D*)

1cm100

R21

[Sol. 3rd line 5 2

22 5

1

2

1R

1 ;

1cm100

21R

]

Q.19 The appropriate formula of "dichloridobis(ethane-1,2-diamine)platinum (IV) nitrate is(A*) [PtCl2(en)2] (NO3)2 (B) [Pt(en)2Cl2](NO3)2(C) [Pt(en)2Cl2] NO3 (D) [PtCl2(en)2] NO3

Q.20 The number of geometrical isomers and optical isomers of [Pt(NH3)(Br)(Cl)(Py)] are respectively.(A) 2, 0 (B) 3, 2 (C*) 3, 0 (D) 2, 2

Q.21 Which of the following molecules has longest C == C bond length?(A) CH2 == C == CH2 (B) CH3 �� CH == CH2

(C)

CH3

CCH3 CH2CH

CH3

(D*) CCH3 CH2

CH3

Q.22 Correct order for heat of combustion (HOC) is:

(I) (II) (III)(A*) III > II > I (B) I > II > III(C) I > III > I (D) II > I > III

Q.23 Which of the following set of species are paramagnetic?(A) ClO2, O3, NO2 (B*) ClO2, O2, NO2 (C) O3, O2, P4 (D) N2, B2, C2

Q.24 Which of the following does not exist?(A) Tl(I3) (B) PbF4 (C) FeCl3 (D*) SCl6


CHEMISTRYQ.25 Relation between following compunds is

CH3

F

H D

Cl PhCl Ph

CH3

H D

F

(A) Identical (B*) Enantiomers (C) Positional isomer (D) Diastereomers

Q.26 Which of the following will act as buffer solution?(a) 100 ml of 0.1M NaOH + 100 ml of 0.1M acetic acid(b) 100 ml of 0.1M NaOH + 200 ml of 0.1M acetic acid(c) 200 ml of 0.1M NH3 + 100 ml of 0.1M HCl(d) 100 ml of 0.1M HCl + 100 ml of 0.1M sodium acetate

Select the correct answer using the codes given below:(A) a and b (B*) b and c (C) c and d (D) a and c

Sol. [Hint : Acidic buffer = WA + A�, Basic buffer = WB + B+]

Q.27 If Al3+ replaces Na+ situated at the edge centres of NaCl crystal then calculate cation vacancies in1 mole NaCl crystal.(A*) 3.01 × 1023 (B) 6.01 × 1023 (C) 1.5 × 1023 (D) 1.12 × 1022

Sol. [Hint : 3 Na+ ions are replaced by one Al3+ ion. Hence number of cation vacancies = 2.]

Q.28 Which of the indicated H in the following is most acidic?

O

NN

H(p)

(Z)H

H

H(X)

H H O(Y)

(A) X (B) Y (C) Z (D*) p

Q.29 Which of the following is planar?

(A) B2H6 (B) Fe2Cl6 (C) 4FeCl (D*) 2

4PtClQ.30 Reaction : F2 + 2ClO2 2FClO2 follows the rate law:

V = k[F2] [ClO2]Review the following data and evaluate the values of rate X and Y.

[F2] [ClO2] Rate [mole L�1 s�1]

0.1 M 0.01 M 1.2 × 10�3

0.1 M 0.04 M X0.2 M 0.01 M Y

(A) 4.8 × 10�1, 1.2 × 10�3 (B) 3.5 × 10�1, 2.4 × 10�3

(C*) 4.8 × 10�3, 2.4 × 10�3 (D) 2.4 × 10�3, 1.44 × 10�6


CHEMISTRYQ.31. Which of the following compunds are stereoisomers of each other-

(A*) & (B) &

(C)

Cl

Cl

&

Cl

Cl

(D) CH3H

Me

D

& H3C H

Me

D

Q.32 Give the correct order of True (T) or False (F) statements.(I) Gas A diffuses twices as fast as gas B. If the vapour density of the gas A is 4, molar mass of gas

B will be 32.

(II) )(OH)s(OH 22 l Sign A work is +ve.

(III) When a solution is prepared by mixing 90 ml of HCl solution (pH = 3), 10 ml of NaOH solution(pH=11) & 60 ml of H2O, pH will be 3.1

(A*) TTF (B) TFT (C) FFT (D) TTT

Q.33 A reaction has an equilibrium constant of 0.98 at 300 K and 1.2 at 400 K. Select the incorrect option.(A) The reaction is endothermic(B) At standard conditions reaction will be non spontaneous at 300 K and spontaneous at 400 K.

(C) Enthalpy change of reaction 98.0

2.1lnR1200Ho

R

(D*) 98.0

2.1lnR3So

R

[Assume H° and S° to be temperature independent]

20120923 chemistry sms

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