Cannizzaro reaction is given by

Options

A. `HCHO`
B. `CH_(3)COCH_(3)`
C. `CH_(3)CHO`
D. `CH_(3)CH_(2)OH`

Answer

**Step-by-Step Solution:**

1. **Understanding Cannizzaro Reaction**: The Cannizzaro reaction is a redox reaction that occurs in aldehydes lacking alpha-hydrogen atoms. In this reaction, one molecule of the aldehyde is oxidized to a carboxylic acid, while another molecule is reduced to an alcohol.

2. **Identifying Aldehydes**: To determine which compounds can undergo the Cannizzaro reaction, we need to identify aldehydes that do not have alpha-hydrogen atoms. Aldehydes can be represented as RCHO, where R is a hydrocarbon group.

3. **Examples of Aldehydes**:
- **Formaldehyde (HCHO)**: This compound has no alpha-hydrogen and can undergo the Cannizzaro reaction.
- **Benzaldehyde (C6H5CHO)**: This compound also lacks alpha-hydrogens and can participate in the Cannizzaro reaction.
- **Acetaldehyde (CH3CHO)**: This compound has alpha-hydrogens (the methyl group has hydrogen atoms) and therefore does not undergo the Cannizzaro reaction.
- **Acetone (CH3COCH3)**: This is a ketone, not an aldehyde, and does not undergo the Cannizzaro reaction.

4. **Conclusion**: Based on the analysis, the only compounds that can undergo the Cannizzaro reaction are formaldehyde and benzaldehyde. Acetaldehyde and acetone do not participate in this reaction.

5. **Final Answer**: The Cannizzaro reaction is given by formaldehyde and benzaldehyde.

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