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JEE Main

Explore popular questions from Aldehydes, Ketones and Carboxylic Acids for JEE Main. This collection covers Aldehydes, Ketones and Carboxylic Acids previous year JEE Main questions hand picked by experienced teachers.

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Aldehydes, Ketones and Carboxylic Acids

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Q 1. A compound (A), {tex} \mathrm { C } _ { 4 } \mathrm { H } _ { 8 } \mathrm { Cl } _ { 2 } , {/tex} on hydrolysis gives a product (B) which forms a 2,4-DNP derivative but does not reduce Tollens reagent. The compound (A) has the structure

A

{tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CHClCH } _ { 2 } \mathrm { Cl } {/tex}

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

C

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

D

{tex} \mathrm { CH } _ { 3 } \mathrm { CHClCHClCH } _ { 3 } {/tex}

Explanation

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Q 2. When propionic acid is treated with aqueous sodium bicarbonate, {tex} \mathrm { CO } _ { 2 } {/tex} is liberated. The {tex} \mathrm { C } {/tex} of {tex} \mathrm { CO } _ { 2 } {/tex} comes from:

A

methyl group

B

carboxylic acid group

C

methylene group

bicarbonate group

Explanation



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Q 3. When benzyl chloride is treated with ethanolic {tex} \mathrm { KCN } , {/tex} followed by acidification, the major product formed is:

A

benzoic acid

B

benzyl alcohol

C

benzyl cyanide

phenyl acetic acid

Explanation

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Q 4. {tex} \mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } {/tex} on reaction with sodium ethoxide in ethanol gives {tex} \mathrm { A } , {/tex} which on heating in the presence of acid gives {tex} \mathrm { B } {/tex}, then compound {tex} \mathrm { B } {/tex} is-

A

{tex} \mathrm { CH } _ { 3 } \mathrm { COCH } _ { 2 } \mathrm { COOH } {/tex}

{tex} \mathrm { CH } _ { 3 } \mathrm { COCH } _ { 3 } {/tex}

C

D

Explanation