Question

Carbonyl group is converted into methylene group by?

• A. Acidic reduction
• B. Raney Ni
• C. Basic hydrolysis
• D. Normal Hydrogenation

Answer 1

The correct option is A Acidic reduction

It is basically reduction reaction where $-\underset{|}{C}=O$ bond is reduced to $-\underset{|}{C}{H}_2$ bond using $Zn\left(Mg\right)+conc.HC$ which is acidic reduction.

Acid increases electrophilicity of carbonyl carbon by oxygen protonation.