Formaldehyde undergoes Cannizzaro's reaction since it has one alpha hydrogen atom.

Explanation

### Step-by-Step Solution:

1. **Understanding the Statement**: The statement claims that formaldehyde undergoes Cannizzaro's reaction because it has one alpha hydrogen atom. We need to analyze the accuracy of this statement.

2. **Identifying Alpha Hydrogen**: Alpha hydrogens are the hydrogen atoms attached to the carbon atom adjacent to the carbonyl group (C=O). In the case of formaldehyde (HCHO), there are no carbon atoms adjacent to the carbonyl carbon, which means there are no alpha hydrogens present.

3. **Cannizzaro's Reaction**: Cannizzaro's reaction occurs in aldehydes that do not have alpha hydrogens. In this reaction, a strong base facilitates the disproportionation of aldehydes into alcohols and carboxylic acids. Since formaldehyde lacks alpha hydrogens, it can undergo Cannizzaro's reaction.

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