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JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Aldehydes Ketones and Carboxylic Acids

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : (see structure) can be subjected to Wolff-Kishner reduction to give (see structure)

Reason R : Wolff-Kishner reduction is used to convert (see structure) into (see structure)

In the light of the above statements, choose the correct answer from the options given below :
Structure A
A
Structure B
B
Structure C
C
Structure D
D
  1. (A)Both A and R are true but R is NOT the correct explanation of A .
  2. (B)A is true but R is false.
  3. (C)A is false but R is true.✓ Correct
  4. (D)Both A and R are true and R is the correct explanation of A .

Answer: (C)

Solution

Assertion A is false because Wolff-Kishner reduction is not suitable for base-sensitive groups. The chloro substituent in the given compound would undergo elimination under the strongly basic conditions of Wolff-Kishner reduction. Reason R is true: Wolff-Kishner reduction converts carbonyl groups () to methylene groups () using hydrazine and strong base.

JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Single correct option

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