What is the action of hydrogen cyanide on Acetaldehyde ?

Explanation

To understand the action of hydrogen cyanide (HCN) on acetaldehyde (C2H4O), we will go through the reaction step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are acetaldehyde (CH3CHO) and hydrogen cyanide (HCN).

2. **Structure of Acetaldehyde**:
...