Benzaldehyde cannot undergo Cannizzaro reaction.

Answer

**Step-by-Step Solution:**

1. **Understanding Cannizzaro Reaction:**
The Cannizzaro reaction is a redox reaction that occurs with aldehydes that do not have alpha-hydrogens. In this reaction, one molecule of the aldehyde is oxidized to a carboxylic acid, while another molecule is reduced to an alcohol.

2. **Identifying Benzaldehyde:**
Benzaldehyde (C₇H₆O) has the structure C₆H₅CHO. It consists of a benzene ring (C₆H₅) attached to a carbonyl group (CHO).

3. **Checking for Alpha-Hydrogens:**
The alpha position is the carbon adjacent to the carbonyl carbon. In benzaldehyde, the carbonyl carbon is directly attached to the benzene ring, which does not have any hydrogen atoms on it. Therefore, there are no alpha-hydrogens present.

4. **Conclusion on Benzaldehyde and Cannizzaro Reaction:**
Since benzaldehyde does not have any alpha-hydrogens, it can indeed undergo the Cannizzaro reaction. In the presence of a strong base like dilute NaOH, benzaldehyde will react to produce benzyl alcohol and sodium benzoate.

5. **Final Statement:**
The statement "Benzaldehyde cannot undergo Cannizzaro reaction" is false. Benzaldehyde can undergo the Cannizzaro reaction due to the absence of alpha-hydrogens.

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