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JEE Advanced > Haloalkanes and Haloarenes

Explore popular questions from Haloalkanes and Haloarenes for JEE Advanced. This collection covers Haloalkanes and Haloarenes previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

Chlorobenzene can be prepared by reacting aniline with:

A

hydrochloric acid

B

cuprous chloride

C

chlorine in presence of anhydrous aluminium chloride

nitrous acid followed by heating with cuprous chloride

Explanation

Q 2.

Correct4

Incorrect-1

The reaction of toluene with chlorine in presence of ferric chloride gives predominantly:

A

benzoyl chloride

B

{tex} m {/tex} -chlorotoluene

C

benzyl chloride

{tex} o - {/tex} and {tex} p {/tex} -chlorotoluene

Explanation

Q 3.

Correct4

Incorrect-1

The reaction conditions leading to the best yields of {tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } {/tex} are:

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 6 } ( \text { excess } ) + \mathrm { Cl } _ { 2 } \stackrel { \text { uv light } } { \longrightarrow } {/tex}

B

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 6 } + \mathrm { Cl } _ { 2 } \xrightarrow [{ \text {room temperature } } ]{ \text { dark } } {/tex}

C

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 6 } + \mathrm { Cl } _ { 2 } ( \text { excess } ) \stackrel { \text { uv light } } { \longrightarrow } {/tex}

D

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 6 } + \mathrm { Cl } _ { 2 } \stackrel { \text { uv light } } { \longrightarrow } {/tex}

Explanation


Q 4.

Correct4

Incorrect-1

n-Propyl bromide on treatment with ethanolic potassium hydroxide produces

A

Propane

Propene

C

Propyne

D

Propanol

Explanation

Q 5.

Correct4

Incorrect-1

The number of structural and configurational isomers of a bromo compound, {tex} \mathrm { C } _ { 5 } \mathrm { H } _ { 9 } \mathrm { Br } {/tex}, formed by the addition of {tex} \mathrm {HBr} {/tex} to {tex}2{/tex}-pentyne respectively are

A

1 and 2

2 and 4

C

4 and 2

D

2 and 1

Explanation

Q 6.

Correct4

Incorrect-1

{tex} 1 - {/tex} Chlorobutane on reaction with alcoholic potash gives

{tex} 1 - {/tex}butene

B

{tex} 1 - {/tex}butanol

C

{tex} 2 - {/tex}butene

D

{tex} 2 - {/tex} butanol

Explanation

Q 7.

Correct4

Incorrect-1

The chief reaction product of reaction between {tex} n {/tex} -butane and bromine at {tex} 130 ^ { \circ } \mathrm { C } {/tex} is:

A

C

D

Explanation

Q 8.

Correct4

Incorrect-1

Isobutyl magnesium bromide with dry ether and ethyl alcohol gives:

A

C

D

Explanation

Q 9.

Correct4

Incorrect-1

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { CMgCl } {/tex} on reaction with {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex} produces:

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { CD } {/tex}

B

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { OD } {/tex}

C

{tex} \left( \mathrm { CD } _ { 3 } \right) _ { 3 } \mathrm { CD } {/tex}

D

{tex} \left( \mathrm { CD } _ { 3 } \right) _ { 3 } \mathrm { OD } {/tex}

Explanation

Q 10.

Correct4

Incorrect-1

A solution of {tex} ( + ) - 2 - {/tex} chloro {tex} - 2 {/tex} -phenylethane in toluene racemises slowly in the presence of small amount of {tex} \mathrm { SbCl } _ { 5 } {/tex}, due to the formation of

A

carbanion

B

carbene

C

free-radical

carbocation

Explanation


Q 11.

Correct4

Incorrect-1

Identify the set of reagent/ reaction conditions 'X' and 'Y' in the following set of transformations

A

{tex} \mathrm { X } = {/tex} dilute aqueous {tex} \mathrm { NaOH } , 20 ^ { \circ } \mathrm { C } ; \mathrm { Y } = \mathrm { HBr } {/tex} acetic acid, {tex} 20 ^ { \circ } \mathrm { C } {/tex}

{tex} \mathrm { X } = {/tex} concentrated alcoholic {tex} \mathrm { NaOH } , 80 ^ { \circ } \mathrm { C } ; \mathrm { Y } = \mathrm { HBr } /{/tex}acetic acid, {tex} 20 ^ { \circ } \mathrm { C } {/tex}

C

{tex} \mathrm { X } = {/tex} dilute aqueous {tex} \mathrm { NaOH } , 20 ^ { \circ } \mathrm { C } ; \mathrm { Y } = \mathrm { Br } _ { 2 } / \mathrm { CHCl } _ { 3 } , \mathrm { 0 } ^ { \circ } \mathrm { C } {/tex}

D

{tex} \mathrm { X } = \mathrm { } {/tex} concentrated alcoholic {tex} \mathrm { NaOH } , 80 ^ { \circ } \mathrm { C } ; \mathrm { Y } = \mathrm { Br } _ { 2 } / \mathrm { CHCl } _ { 3 } {/tex}, {tex} 0 ^ { \circ } \mathrm { C } {/tex}

Explanation

Q 12.

Correct4

Incorrect-1


How many structures for {tex} \mathrm { F } {/tex} are possible?

A

2

B

5

C

6

3

Explanation




Q 13.

Correct4

Incorrect-1

What would be the product formed when {tex} 1 - {/tex} bromo- {tex} 3 - {/tex} chlorocyclobutane reacts with two equivalents of metallic sodium in ether?

A

B

C

Explanation

Q 14.

Correct4

Incorrect-1

When phenyl magnesium bromide reacts with tert-butanol, the product would be

Benzene

B

Phenol

C

ter-butylbenzene

D

ter-butyl phenyl ether

Explanation

Q 15.

Correct4

Incorrect-1

The reagent(s) for the following conversion,

is/are

A

alcoholic {tex} \mathrm {KOH} {/tex}

alcoholic {tex} \mathrm {KOH} {/tex} followed by {tex} \mathrm {NaNH_2} {/tex}

C

aqueous {tex} \mathrm {KOH} {/tex} followed by {tex} \mathrm {NaNH_2} {/tex}

D

{tex} \mathrm { Zn } / \mathrm { CH } _ { 3 } \mathrm { OH } {/tex}

Explanation

Q 16.

Correct4

Incorrect-1

The major product of the following reaction is -

B

C

D

Explanation


Q 17.

Correct4

Incorrect-1

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { CMgCl } {/tex} on reaction with {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex} produces:

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { CD } {/tex}

B

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { OD } {/tex}

C

{tex} \left( \mathrm { CD } _ { 3 } \right) _ { 3 } \mathrm { CD } {/tex}

D

{tex} \left( \mathrm { CD } _ { 3 } \right) _ { 3 } \mathrm { OD } {/tex}

Explanation

Q 18.

Correct4

Incorrect-1

Which of the following has the highest nucleophilcity?

A

{tex} \mathrm { F } ^ { - } {/tex}

B

{tex} \mathrm { OH ^-} {/tex}

{tex} \mathrm { CH } _ { 3 } ^ { - } {/tex}

D

{tex} \mathrm { NH } _ { 2 } ^-{/tex}

Explanation

Q 19.

Correct4

Incorrect-1

The order of reactivities of the following alkyl halides for a {tex} \mathrm { S } _ { \mathrm { N } } 2 {/tex} reaction is

A

{tex} \mathrm { RF } > \mathrm { RCl } > \mathrm { RBr } > \mathrm { RI } {/tex}

B

{tex} \mathrm { RF } > \mathrm { RBr } > \mathrm { RCl } > \mathrm { RI } {/tex}

C

{tex} \mathrm { RCl } > \mathrm { RBr } > \mathrm { RF } > \mathrm { RI } {/tex}

{tex} \mathrm { RI } > \mathrm { RBr } > \mathrm { RCl } > \mathrm { RF } {/tex}

Explanation