Question

Given below are two statements. one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: can be subjected to Wolff-Kishner reduction to give
Reason R: Wolff-Kishner reduction is used to convert into 
In the light of the above statements, choose the correct answer from the options given below:

• A. A is true but R is false
• B. ) Both A and R are true and R is the correct explanation of A
• C. A is false but R is true
• D. Both A and R are true but R is NOT the correct explanation of A

Answer 1

The Correct Option is C

Assertion (A):

The Wolff-Kishner reduction converts a carbonyl group (\( C=O \)) into a methylene group (\( CH_2 \)). The assertion states that 2-chloropropanal (\( \text{CH}_3\text{CHClCHO} \)) can undergo Wolff-Kishner reduction to form 2-chloropropane .

This assertion is false, because the Wolff-Kishner reduction would reduce the aldehyde group (\( C=O \)) to a methylene group (\( CH_2 \)), but it cannot alter or affect the chlorine substituent.

The reaction proceeds as follows:

Reason (R):

The reason states that the Wolff-Kishner reduction is used to convert \( C=O \) into \( CH_2 \). This is true and represents the principle behind the Wolff-Kishner reduction, where hydrazine (\( \text{NH}_2\text{NH}_2 \)) reacts with the carbonyl compound in the presence of a strong base like \( \text{KOH} \).

Final Answer:

A is false but R is true.