What is the action of hydrazine on formaldehyde ?

Explanation

To understand the action of hydrazine on formaldehyde, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are formaldehyde (HCHO) and hydrazine (N2H4).

2. **Structure of Formaldehyde**:
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