Question:easy
Which of the following compounds undergoes Cannizzaro's reaction?
Which of the following compounds undergoes Cannizzaro's reaction?
Show Hint
Cannizzaro's reaction needs an aldehyde with no alpha hydrogen atom.
Updated On: Nov 12, 2026
- Acetaldehyde
- Formaldehyde
- Propionaldehyde
- Butyraldehyde
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Condition
Only aldehydes without alpha hydrogen give this reaction. Aldehydes with alpha hydrogen undergo aldol condensation instead.
Step 2: Eliminate
Acetaldehyde, propionaldehyde and butyraldehyde have alpha hydrogens, so they are eliminated.
Step 3: Conclusion
Formaldehyde is the only one with no alpha hydrogen.
Final Answer:
Formaldehyde is the compound that undergoes Cannizzaro's reaction. \[ \boxed{\text{(B) }\text{Formaldehyde}} \]
Only aldehydes without alpha hydrogen give this reaction. Aldehydes with alpha hydrogen undergo aldol condensation instead.
Step 2: Eliminate
Acetaldehyde, propionaldehyde and butyraldehyde have alpha hydrogens, so they are eliminated.
Step 3: Conclusion
Formaldehyde is the only one with no alpha hydrogen.
Final Answer:
Formaldehyde is the compound that undergoes Cannizzaro's reaction. \[ \boxed{\text{(B) }\text{Formaldehyde}} \]
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