Complete the following reaction: [C] is _______

Complete the following reaction:

[C] is _______

A -

B -

C -

D -

The answer is A.

Solution

The ketone forms a cyanohydrin [B] with HCN, which on treatment with conc. H2SO4 gives [C].

Reaction scheme: [A] $\xrightarrow{HCN}$ [B] $\xrightarrow[\Delta]{conc.\ H_2SO_4}$ [C]. [add image]

Concept HCN addition and hydrolysis

2 questions from this chapter have appeared across 2 exam years.