AITS PACE

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CENTERS : MUMBAI / DELHI / AKOLA / KOLKATA / LUCKNOW / NASHIK / GOA / PUNE # 10

AITS - 1 CHEMISTRY (MAIN)

CHEMISTRY : PART (B)

SECTION I : SINGLE CHOICE QUESTIONS

This section contains 30 multiple choice questions.Each question has four choices (1),

(2), (3) and (4) out of which ONLY ONE is correct.

31. You are given 5m (molal) aqueous solution of H2SO4of density 1.49 gm/ml, then which of the following

is incorrect :

(1) molarity (M) of the solution = 5 M (2) mole fraction of solute = 0.083

(3) % by weight of H2SO4 = 40% (4) concentration of H+ion = 10 M

32. The enthalpy of neutralisation of a weak monoacidic base(1M) with strong acid is 56.9 KJ/mol. If the enthalpy

of ionisation of weak monoacidic base is 1.8 KJ/mol, the percentage ionisation of weak base in its molar solution

is [Given that DHneutralisation

of strong acid and strong base = 57.3 KJ/mol]

(1) 100/3% (2) 200/3% (3) 25% (4) 700 / 9%

33.( ) ( ) ( )

2 2 3g g g

2SO O 2 SO+ starting with 2 mole of SO2and 1 mole of O

2in 1 litre flask. Equilibrium mixture

required3

1mole of K

2Cr

2O

7for titration in acidic medium. Hence K

Cfor the given reaction is.

(1) 2 (2)2

1(3) 4 (4)

4

1

34. A hypothetical reaction X2+ Y

2 2XY follows the mechanism given below..

X2 X + X [Fast]

X + Y2 XY + YY [Slow]

X + Y XY [Fast]

The order of overall reaction is

(1) 2 (2) 1 (3) 1.5 (4) Zero

SPACE FOR ROUGH WORK

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35. The IUPAC name of the complex

[Co(NH3)

2Cl(ONO)(py)

2]NO

3is :

(1) DiamminechloridodipyridinenitritoNcobaltate(III) nitrate.

(2) DiamminechloridonitritoObipyridinecobalt(III) nitrate.

(3) DiamminechloridonitritoObis(pyridine)cobalt(III) nitrate.

(4) ChloridodiamminenitritoObis(pyridine)cobaltate(III) nitrate.

36. Two reactions, A products and B products have rate constants kAand kBat temperature, T and

activation energies EAand E

Brespectively. If k

A> k

Band E

A< E

Band assuming that A , pre-exponential factor

for both the reactions is same then. (EA- E

Bare independent of T)

(1) at higher temperatures kBwill be greater than k

A

(2) at lower temperatures kB> k

A.

(3) as temperature rises kAand k

Bwill be close to each other in magnitude.

(4) None of these

37. Which of the following statement(s) is / are correct ?

(1) Hybridisation of carbon in C3O

2is sp2.

(2) In Cr2O72

, six Cr O bonds are identical.(3) Three centre two electron bonds exist in B

2H

6and Al

2Cl

6.

(4) In AgI, the colour is attributed to charge transfer spectrum.

38. In which of the following complex ion, the metal ion will have 0g6g2 e,t configuration according to CFT::

(1) [FeF6]3 (2) [Fe(CN)

6]3 (3) [Fe(CN)

6]4 (4) None of these

39. A soluteS undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point

elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08

molal solution of a solute which neither undergoes association nor dissociation. To what percent had the

solute S undergone trimerization? (Assume the solvent to be same in both the solution)(1) 30% (2) 40% (3) 50% (4) 60%


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40. An azeotropic mixture of two liquids boils at a lower temperature than either of them when :

(1) it is saturated.

(2) it does not deviate from Raoult's law

(3) it shows negative deviation from Raoult's law

(4) it shows positive deviation from Raoult's law .

41. Action of PCl5on SO

2chiefly yields

(1) POCl3

(2) P4S

3(3) SO

2Cl

2(4) SO

3

42. Which statement is false.

(1) Glycine is amphoteric in nature.

(2) Hydrolysis of sucrose is known as inversion of cane sugar.

(3) Sucrose undergoes mutarotation.

(4) Maltose and Lactose both are reducing sugar.

43. For a reaction P Q, the half life of the reaction was 3 hrs., when initial concentration of P was 0.5 M. As

the concentration of P was increased to 1.0M, half life changes to 6 hrs. The order of reaction with respectto P is

(1) zero (2) one (3) two (4) three

44. Which one of the following statements is correct:

(1) Brownian movement is more pronounced for smaller particles than for bigger ones

(2) Sols of metal sulphides are lyophilic

(3) Schulze-Hardy law states, the bigger the size of the ion, the greater is its coagulating power

(4) One would expect charcoal to adsorb hydrogen gas more strongly than chlorine.

45. In H2- O

2 fuel cell a reaction occuring at cathode is :

(1) 2 H2O + O2+ 4 e- 4OH

- (2) 2 H2+ O2 2 H2 O (l)

(3) H+ + OH- H2O (4) H+ + e-

1

2H2


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46. In which of the following reactions, standard reaction entropy change (S) is positive and standard Gibbs

energy change (G) decreases sharply with increasing temperature ?

(1) C graphite +2

1O

2(g) CO(g) (2) CO(g) +

2

1O

2(g) CO

2(g)

(3) Mg(s) +2

1O

2(g) MgO(s) (4)

2

1C graphite +

2

1O

2(g)

2

1CO

2(g)

47. Aluminium is extracted from alumina (Al2O

3) by electrolysis of a molten mixture of :

(1) Al2O

3+ HF + NaAlF

4(2) Al

2O

3+ CaF

2+ NaAlF

4

(3) Al2O

3+ Na

3AlF

6+ CaF

2(4) Al

2O

3+ KF + Na

3AlF

6

48. pH of a saturated solution of Ba(OH)2is 12. The value of solubility product (K

SP) of Ba(OH)

2is :

(1) 3.3 !107M3 (2) 5.0 !107M3 (3) 4.0 !106M3 (4) 5.0 !106M3

49. In the given reaction sequence.

CH3 14CH

2 OH /H/KMnO)i( 4 X

/NH)ii(

SOCl)i(3

2YY

,OH

Br2 Z

(Z) will be

(1) CH3NH

2(2) 14CH

3NH

2(3) CH

314CH

2NH

2(4)


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50. In which option all compounds can show geometrical isomerism

(1)

(2) , C2FClBrI.

(3) , Ph CH = N OH, Ph2N

2

(4) CH3CH = NOH , H

2C = CHCH = CHCN.

51. Which of the following will not show keto enol tautomerism

(1) (2) (3) CH2=CHCHO (4)

52. The stability order of the following species is :

I : II :

III : IV :

(1) I > II > III > IV (2) III > I > II > IV (3) IV > II > III > I (4) IV > III > II > I


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53. /NaOH P ; the major product 'P' is

(1) (2)

(3) (4)

54.)1(

Peroxyacid

)2(

BrMgCHPh2 )3(

OH2

The product is :

(1) (2)

(3) (4)


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55. In the following conversion,

+

O3H)ii(

MeMgBr)i(X

+

O3H

2/NaOH I YY

the major products X and Y, respectively, are :

(1) (2)

(3) (4)

56. Which of the following undergoes decarboxylation most readily on being heated ?

(1) (2)

(3) (4)


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57. XOH,Zn

O

2

3 Y + Z

OH

Compound X in the above reaction is

(1) (2)

(3) (4)


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58. final product is

(1) (2) (3) (4)

59.( )m

possible products

( )npossible products

the value of m and n are respectively

(1) 2,4 (2) 3,6 (3) 3,4 (4) 3,5

60. Which of these reaction gives meso compound as product

(1) Ni/D2 (2) reagents'Bayer

(3) Ni/2D (4)

OH

HPhCO

3

3


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