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JEE Advanced

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

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Q 1. Which of the following cannot react with {tex} \mathrm { HNO } _ { 2 } ? {/tex}

A

{tex} \mathrm { CH } _ { 3 } \mathrm { CONH } _ { 2 } {/tex}

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 3 } \mathrm { CNO } _ { 2 } {/tex}

C

{tex} \left( \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \right) _ { 2 } \mathrm { NH } {/tex}

D

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { NH } _ { 2 } {/tex}

Explanation

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Q 2. The following reaction constitutes:
{tex} \mathrm { RNH } _ { 2 } + \mathrm { S } = \mathrm { C } = \mathrm { S } \frac { \mathrm { HgCl } _ { 2 } } { \mathrm { H } _ { 2 } \mathrm { S } }\underset{\mathrm{Alkyl\ isothiocynate}}{ \mathrm { R } - \mathrm { N } = \mathrm { C } = \mathrm { S } }+ \mathrm { H } _ { 2 } \mathrm { S } {/tex}

Mustard oil reaction

B

Test for {tex} 3 ^ { \circ } {/tex} amine

C

Test for {tex} 2 ^ { \circ } {/tex} amine

D

Test for {tex}\mathrm{CS_2}{/tex}

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Q 3. Nitrobenzene on electrolytic reduction gives:

A

Azobenzene

B

Hydrazobenzene

C

Aminophenol

Aniline

Explanation

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Q 4. Which of the following amines will form stable diazonium salt at {tex} 273 - 283 \mathrm { K? } {/tex}

A

{tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { NH } _ { 2 } {/tex}

B

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { NH } _ { 2 } {/tex}

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { NH } _ { 2 } {/tex}

D

{tex} \mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 } {/tex}

Explanation

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Q 5. The reaction of primary amine with chloroform and ethanoic solution of {tex}\mathrm{KOH}{/tex} is called:

A

Hofmann reaction

B

Reimer-Tiemann reaction

Carbylamine reaction

D

Kolbe reaction

Explanation

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Q 6. The most unlikely representation of resonance structures of {tex} p {/tex} -nitrophenoxide ion is:

A

B

D

Explanation

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Q 7.
Compound {tex} ( \mathrm { A } ) {/tex} is:

B

C

D

Explanation





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Q 8.

B

C

D

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Q 9.

Which of the following cannot react with ?

A

C

D

Explanation

nitro compound does not react with

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Q 10.

Primary, secondary, tertiary amines can be separated by the following except:

A

Fractional distillation

B

Fractional method using diethyl oxalate

C

Hinsberg's method using

Selective crystallisation

Explanation

Statement is self explanatory

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Q 11.

The correct order of basicities of the following compound is:

A

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

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

C

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

D

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

Explanation

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

1.

More basic due to the presence of two LP 's on each N

2. . Due to +I effect of (Et) group, but +I effect of two Me group is greater than +I effect of (Et) group. Hence, (3) is more basic than (2)

3. . Due to (+I) effect of two Me groups

4. (Amides are resonance stabilised; so they are the weakest bases. Amides behave as amphoteric.)

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Q 12.

Stephen's reduction converts nitriles into:

Aldehydes

B

Ketones

C

Amines

D

Carboxylic acids

Explanation

Stephen''s reduction is partial reduction of RCN to aldehydes

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Q 13.

Which of the following will yield phenylhydrazine hydrochloride?

A

Benzene and hydrazine

B

Hydrazine and

Benzenediazonium chloride and

D

Nitrobenzene and

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Q 14.

Amongst the compound given, the one that would form a brilliant coloured dye on treatment with in dil. followed by addition to an alkaline solution of naphthol is

A

B

D

Explanation

As we know, benzenediazonium salt forms brilliant coloured dye with -naphthol, the compound under consideration must be p-toludine (c) as it is a primary aromatic amine. Primary aromatic amine, on treatment with in dil. HCI forms the corresponding diazonium chloride salt.

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Q 15.

Among the following, the strongest base is:

A

B

-

C

-

Explanation

(d) is an aliphatic amine; so it is stronger base than aromatic amine. Moreover, EWG at or decreases the basic character. The basicity order is:

(d)>(a)>(c)>(b)

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Q 16.

Mendius reaction involves the:

A

Reduction of aldehydes to give alcohols

Reduction of nitriles with sodium and ethanol

C

Oxidation of nitriles

D

Hydrolysis of cyanides

Explanation

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Q 17.

In order to distinguish between and , which of the following reagents is useful?

A

Hinsberg reagent

-Naphthol

C

Benzene diazonium chloride

D

None of the above

Explanation

aromatic amine on diazotisation followed by coupling with -naphthol gives azo dye test

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Q 18.

Primary and secondary amines are distinguished by:

A

B

D

Explanation

is used to distinguish between , and amines

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Q 19.

The following reaction constitutes:

Alkyl isothiocynante

Mustard oil reaction

B

Test for amine

C

Test for amine

D

Test for

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Q 20.

Nitrobenzene on electrolytic reduction gives:

A

Azobenzene

B

Hydrazobenzene

C

Aminophenol

Aniline

Explanation

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Q 21.

When propane is subjected to the treatment with fuming nitric acid at 673 K, which of the following will not be formed?

A

1-Nitropropane

B

2-Nitropropane

C

Nitromethane

Nitrohexane

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Q 22.

Which of the following is the weakest base?

A

B

D

Explanation

Basic order:

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Q 23.

Nitrobenzene is subjected to reduction with zinc dust and ammonium chloride. The main product formed will be:

A

Benzenamine

B

Aniline

N-Phenylhydroxylamine

D

None of these

Explanation

-Phenyl hydroxylamine

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Q 24.

Nitrogen is likely to be evolved when in dilute is wanted with:

A

B

C

Explanation

Only in aliphatic amines

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Q 25.

The electrolytic reduction of nitrobenzene in strongly acidic medium produces:

A

Phenol

-Aminophenol

C

Hydroazobenzene

D

Azobenzene