Question

Identify 'A' in the following reaction :

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is B

The specified reaction is a Wolff-Kishner reduction, a method for converting carbonyl groups (aldehydes and ketones) into alkanes.

Initially, a hydrazone derivative is formed: \[ \text{CH}_3 - \text{CO} - \text{CH}_2 - \text{CH}_3 \xrightarrow{\text{N}_2\text{H}_4} \text{CH}_3 - \text{C}(\text{NHNH}_2) - \text{CH}_2 - \text{CH}_3. \]

Under the influence of ethylene glycol and KOH, the hydrazone decomposes to yield: \[ \text{CH}_3 - \text{CH}_2 - \text{CH}_2 - \text{CH}_3. \]

Consequently, product 'A' is identified as butane.