NEET > Organic Compounds Containing Nitrogen

Explore popular questions from Organic Compounds Containing Nitrogen for NEET. This collection covers Organic Compounds Containing Nitrogen previous year NEET questions hand picked by popular teachers.


Q 1.    

Correct4

Incorrect-1

The correct increasing order of basic strength for the following compounds is

A

III < I < II

B

III < II < I

II < I < III

D

II < III < I

Explanation

Q 2.    

Correct4

Incorrect-1

Which of the following reactions is appropriate for converting acetamide to methanamine?

Hoffmann hypobromamide reaction

B

Stephen's reaction

C

Gabriel phthalimide synthesis

D

Carbylamine reaction

Explanation

Q 3.    

Correct4

Incorrect-1

Which one of the following nitro-compounds does not react with nitrous acid?

A

B

D

Explanation



Q 4.    

Correct4

Incorrect-1

A given nitrogen-containing aromatic compound 'A' reacts with {tex} \mathrm { Sn } / \mathrm { HCl } , {/tex} followed by {tex}HNO_{2}{/tex} to give an unstable compound 'B'. 'B', on treatment with phenol, forms a beautiful coloured compound 'C' with the molecular formula {tex}C_{12}H_{10}N_{2}O{/tex}. The structure of compound 'A' is

A

C

D

Explanation



Q 5.    

Correct4

Incorrect-1

The correct statement regarding the basicity of arylamines is

A

arylamines are generally more basic than alkylamines because of aryl group

B

arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is s p-hybridised

arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalised by interaction with aromatic ring {tex}\pi{/tex}-electron system

D

arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalised by interaction with the aromatic ring {tex} \pi {/tex}-electron system.

Explanation



Q 6.    

Correct4

Incorrect-1

The product formed by the reaction of an aldehyde with a primary amine is

A

carboxylic acid

B

aromatic acid

Schiff's base

D

ketone.

Explanation

Q 7.    

Correct4

Incorrect-1

The following reaction

is known by the name

A

Perkin's reaction

B

Acetylation reaction

Schotten-Baumann reaction

D

Friedel-Craft's reaction.

Explanation



Q 8.    

Correct4

Incorrect-1

Method by which aniline cannot be prepared is

A

degradation of benzamide with bromine in alkaline solution

B

reduction of nitrobenzene with {tex} \mathrm { H } _ { 2 } / \mathrm { Pd } {/tex} in ethanol

potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution

D

hydrolysis of phenylisocyanide with acidic solution.

Explanation



Q 9.    

Correct4

Incorrect-1

The number of structural isomers possible from the molecular formula {tex} \mathrm { C } _ { 3 } \mathrm { H } _ { 9 } \mathrm { N } {/tex} is
is known by the name

A

5

B

2

C

3

4

Explanation



Q 10.    

Correct4

Incorrect-1

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

A

azobenzene

B

aniline

p-aminophenol

D

azoxybenzene.

Explanation



Q 11.    

Correct4

Incorrect-1

In the following reaction, the product (A) i

A

B

C

Explanation

Q 12.    

Correct4

Incorrect-1

Which of the following will be most stable diazonium salt {tex} R N _ { 2 } ^ { + } X ? {/tex}

A

{tex} \mathrm { CH } _ { 3 } \mathrm { N } _ { 2 } ^ { + } X^{-} {/tex}

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { N } _ { 2 } ^ { + } X^{-} {/tex}

C

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { N } _ { 2 } ^ { + } X^{-} {/tex}

D

{tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { N } _ { 2 } ^ { + } X^{-} {/tex}

Explanation



Q 13.    

Correct4

Incorrect-1

Nitrobenzene on reaction with conc. {tex} \mathrm { HNO } _ { 3 } / \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} at {tex} 80 - 100 ^ { \circ } \mathrm { C } {/tex} forms which one of the following products?

A

1,4-Dinitrobenzene

B

{tex} 1,2,4 - {/tex} Trinitrobenzene

C

1,2-Dinitrobenzene

{tex} 1,3 {/tex} -Dinitrobenzene

Explanation

Q 14.    

Correct4

Incorrect-1

{tex} \mathrm { H } _ { 3 } \mathrm { PO } _ { 2 } {/tex} and {tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex}

B

{tex} \mathrm { H } ^ { + } / \mathrm { H } _ { 2 } \mathrm { O } {/tex}

C

{tex} \mathrm { HgSO } _ { 4 } / \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex}

D

{tex} \mathrm { Cu } _ { 2 } \mathrm { Cl } _ { 2 } {/tex}

Explanation

Q 15.    

Correct4

Incorrect-1

On hydrolysis of a "compound", two compounds are obtained. One of which on treatment with sodium nitrite and hydrochloric acid gives a product which does not respond to iodoform test. The second one reduces Tollens reagent and Fehling's solution. The "compound" is

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

B

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

C

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { ON } = \mathrm { O } {/tex}

D

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

Explanation



Q 16.    

Correct4

Incorrect-1

Some reactions of amines are given. Which one is not correct?

B

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { NH } _ { 2 } + \mathrm { HNO } _ { 2 } \rightarrow \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } + \mathrm { N } _ { 2 } {/tex}

C

{tex} \mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 } + \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { O } _ { 2 } \mathrm { Cl } \rightarrow \mathrm { CH } _ { 3 } \mathrm { NHSO } _ { 2 } \mathrm { C } _ { 6 } \mathrm { H } _ { 5 } {/tex}

D

{tex} \begin{aligned} \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { NH } + \mathrm { NaNO } _ { 2 } & + \mathrm { HCl } \\ & \rightarrow \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { N } - \mathrm { N } = \mathrm { O } \end{aligned} {/tex}

Explanation



Q 17.    

Correct4

Incorrect-1

An organic compound {tex} \left( \mathrm { C } _ { 3 } \mathrm { H } _ { 9 } \mathrm { N } \right) ( A ) , {/tex} when treated with nitrous acid, gave an alcohol and {tex} \mathrm { N } _ { 2 } {/tex} gas was evolved. {tex} ( A ) {/tex} on warming with {tex} \mathrm { CHCl } _ { 3 } {/tex} and caustic potash gave {tex} ( C ) {/tex} which on reduction gave isopropylmethylamine. Predict the structure of {tex} ( A ) . {/tex}

B

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

C

D

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

Explanation



Q 18.    

Correct4

Incorrect-1

B

C

D

Explanation



Q 19.    

Correct4

Incorrect-1

Which of the following compounds is most basic?

A

C

D

Explanation



Q 20.    

Correct4

Incorrect-1

Aninline in a set of the following reactions yielded a coloured product Y.

The structue of 'Y' would be

B

C

D

Explanation



Q 21.    

Correct4

Incorrect-1

Which of the following statements about primary amines is false?

A

Alkyl amines are stronger bases than aryl amines.

B

Alkyl amines react with nitrous acid to produce alcohols.

Aryl amines react with nitrous acid to produce phenols.

D

Alkyl amines are stronger bases than ammonia.

Explanation



Q 22.    

Correct4

Incorrect-1

Predict the product.

A

B

C

Explanation



Q 23.    

Correct4

Incorrect-1

Nitrobenzene can be prepared from benzene by using a mixture of conc. {tex}HNO_{3}{/tex} and conc. {tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} . In the mixture, nitric acid acts as a/an

A

acid

base

C

catalyst

D

reducing agent.

Explanation



Q 24.    

Correct4

Incorrect-1

In a reaction of aniline a coloured product C was obtained.

The structure of C would be

A

C

D

Explanation

Q 25.    

Correct4

Incorrect-1

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Methyl isocyanide

B

Acetamide

C

Methyl cyanide

D

Nitroethane

Explanation