JEE Main 2011 Chemistry Question Paper Set 2 With Solution

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Question 1:

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

Correct Answer : III in haematite and II, III in magnetite

Question 2:

Among the following complexes (K-P),

K_{3} [F e {(C N)}_{3}] (K)

[C o {(N H_{3})}_{6}] C l_{3} (L)

N a_{3} [C o {(o x a l a t e)}_{3}] (M)

[N i {(H_{2} O)}_{6}] C l_{2} (N)

K_{2} [P t {(C N)}_{4}] (O)

and

[Z n {(H_{2} O)}_{6}] {(N O_{3})}_{2} (P)

the diamagnetic complexes are

Correct Answer : L, M, O, P

Question 3:

Passing

H_{2} S

gas into a mixture of

M n^{2 +}, N i^{2 +}, C u^{2 +} a n d H g^{2 +}

ions in an acidified aqueous solution precipitates

Correct Answer : CuS and HgS

Question 4:

Consider the following cell reaction:

2 {Fe}_{(s)} + O_{2 (g)} + 4 {H^{+}}_{(aq)} \to 2 {Fe}^{2 +}_{(aq)} + 2 H_{2} O (I) E ° = 1.67 V

At [{Fe}^{2 +}] = 10^{- 3} M, P (O_{2}) = 0.1 atm

and pH =3, the cell potential at 25 °C is

Correct Answer : 1.57 V

Question 5:

The freezing point (in °C) of a solution containing 0.1 g of

K_{3} [Fe {(CN)}_{6}] (Mol . Wr . 329)

in 100 g of water

(K_{f} 0 = 1.86 k g m o l^{- 1})

(A)	$- 2.3 x 10^{- 2}$	(B)	$- 5.7 x 10^{- 2}$
(C)	$- 5.7 x 10^{- 3}$	(D)	$- 1.2 x 10^{- 2}$

Correct Answer : A

Question 6:

Amongst the compounds given, the one that would form a brilliant colored dye on treatment with

N a N O_{2}

in dil. HC1 followed by addition to an alkaline solution of β-naphthol is

Correct Answer : C

Question 7:

The major product of the following reaction is

Correct Answer : an acetal

Question 8:

The following carbohydrate is

Correct Answer : an aldohexose

Question 9:

Reduction of the metal centre in aqueous permanganate ion involves

(A)	3 electrons in neutral medium	(B)	5 electrons in neutral medium
(C)	3 electrons in alkaline medium	(D)	5 electrons in acidic medium

Correct Answer : A, C and D

Question 10:

The equilibrium

2 {Cu}^{l} ⇌ {Cu}^{O} + {Cu}^{ll}

in aqueous medium at 25 °C shifts towards the left in the presence of

(A)	${NO}_{3}^{-}$	(B)	${Cl}^{-}$
(C)	${SCN}^{-}$	(D)	${CN}^{-}$

Correct Answer : B, C and D

Question 11:

For the first order reaction

2 N_{2} O_{5} (g) \to 4 N O_{2} (g) + O_{2} (g)

(A)	the concentration of the reactant decreases exponentially with time.	(B)	the half-life of the reaction decreases with increasing temperature.
(C)	the half-life of the reaction depends on the initial concentration of the reactant.	(D)	the reaction proceeds to 99.6 % completion in eight half-life duration.

Correct Answer : A,B and D

Question 12:

The correct functional group X and the reagent/reaction conditions Y in the following scheme are

condensation polymer

(A)	$X = {COOCH}_{3}, Y = H_{2} / Ni / heat$	(B)	$X = {CONH}_{2}, Y = H_{2} / Ni / heat$
(C)	$X = {CONH}_{2}, Y = {Br}_{2} / NaOH$	(D)	$X = CN, Y = H_{2} / Ni / heat$

Correct Answer : C and D

Question 13:

Among the following, the number of compounds than can react with

{PCI}_{5}

to give

{POCI}_{3}

O_{2}, {CO}_{2}, {SO}_{2}, H_{2} O, H_{2} {SO}_{4}, P_{4} O_{10}

(The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 4

Question 14:

The volume (in mL) of 0.1 M

{AgNO}_{3}

required for complete precipitation of chloride ions present in 30 mL of 0.01 M solution of

[Cr {(H_{2} O)}_{5} CI] {CI}_{2}

,as silver chloride is close to (The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 6

Question 15:

In 1 L saturated solution of

A g C I [K_{s p} (A g C I) = 1.6 x 10^{- 10}]

, 0.1 mol of CuCl

[K_{sp} (CuCI) = 1.0 x 10^{- 6}]

is added. The resultant concentration of

{Ag}^{+}

in the solution is

1.6 x 10^{- x}

. The value of “x” is (The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 7

Question 16:

The number of hexagonal faces that are present in a truncated octahedron is (The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 8

Question 17:

The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the following compound, is

(The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 8

Question 18:

The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following carbocation is

(The answer of the questions is a single-digit integer, ranging from 0 to 9)

Correct Answer : 6

Question 19:

Match the transformations in column I with appropriate options in column II

Column I	Column II
(A) ${CO}_{2} (s) \to {CO}_{2} (g)$	(p) phase transition
(B) ${CaCO}_{3} (s) \to CaO (s) + {CO}_{2} (g)$	(q) allotropic change
(C) $2 H ∙ \to H_{2} (g)$	(r) ΔH is positive
(D) $P_{(white, soild)} \to P_{(red, solid)}$	(s) ΔS is positive
	(t) ΔS is negative

(A)	A = p, r and s B = r and s C = t D = p, q and t	(B)	A = r and s B = p and s C = r and s D = q and r
(C)	A = q B = p or p, q, r, s and t C = s D = t	(D)	A = s B = t C = r D = r

Correct Answer : A

Question 20:

Match the reactions in column I with appropriate types of steps/reactive intermediate involved in these reactions as given in column II

Column I	Column II
	(p) Nucleophilic substitution
	(q) Electrophilic substitution
	(r) Dehydration
	(s) Nucleophilic addition
	(t) Carbanion

(A)	A = p, r and s B = r and s C = t D = p, q and t	(B)	A = r, s and t B = p and s C = r and s D = q and r
(C)	A = q B = p or p, q, r, s and t C = s D = t	(D)	A = s B = t C = r D = r

Correct Answer : B

JEE Main 2011 Chemistry Question Paper Set 2 With Solution

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