Solveeit Logo
Login

Question

Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

Identify 'A' in the following reaction :
Reaction

A

1

B

2

C

3

D

4

Answer

2

Explanation

Solution

The given reaction is a Wolff-Kishner reduction , which is used to reduce carbonyl groups (aldehydes and ketones) to alkanes.
Chemical Reaction

The first step involves the formation of a hydrazone derivative: CH3−CO−CH2−CH3→N2H4CH3−C(NHNH2)−CH2−CH3.\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.

In the presence of ethylene glycol and KOH, the hydrazone undergoes decomposition to form: CH3−CH2−CH2−CH3.\text{CH}_3 - \text{CH}_2 - \text{CH}_2 - \text{CH}_3.

Thus, the product 'A' is butane.