Question:
Benzaldehyde is converted to benzyl alcohol by
Benzaldehyde is converted to benzyl alcohol by
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Benzaldehyde has no alpha hydrogen, so with concentrated alkali it undergoes disproportionation.
Updated On: Nov 12, 2026
- Wurtz reaction
- Fittig reaction
- Wurtz Fittig reaction
- Cannizzaro's reaction
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Aldehydes without alpha hydrogen undergo the Cannizzaro reaction with concentrated alkali. One molecule is oxidised and another is reduced.
Step 2: Reaction
\(2\text{C}_{6}\text{H}_{5}\text{CHO}+\text{NaOH}\rightarrow\text{C}_{6}\text{H}_{5}\text{CH}_{2}\text{OH}+\text{C}_{6}\text{H}_{5}\text{COONa}\). Benzyl alcohol is the reduced product.
Step 3: Why the other options fail
Wurtz, Fittig and Wurtz-Fittig reactions couple alkyl or aryl halides with sodium and do not involve aldehydes.
Final Answer:
Benzaldehyde gives benzyl alcohol by Cannizzaro's reaction. \[ \boxed{\text{(D) }\text{Cannizzaro's reaction}} \]
Aldehydes without alpha hydrogen undergo the Cannizzaro reaction with concentrated alkali. One molecule is oxidised and another is reduced.
Step 2: Reaction
\(2\text{C}_{6}\text{H}_{5}\text{CHO}+\text{NaOH}\rightarrow\text{C}_{6}\text{H}_{5}\text{CH}_{2}\text{OH}+\text{C}_{6}\text{H}_{5}\text{COONa}\). Benzyl alcohol is the reduced product.
Step 3: Why the other options fail
Wurtz, Fittig and Wurtz-Fittig reactions couple alkyl or aryl halides with sodium and do not involve aldehydes.
Final Answer:
Benzaldehyde gives benzyl alcohol by Cannizzaro's reaction. \[ \boxed{\text{(D) }\text{Cannizzaro's reaction}} \]
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