Cannizzaro Reaction
Cannizzaro reaction is given by:
Select the correct option:
Solution
Aldehydes without α-hydrogen
Aldehydes that lack an α-hydrogen atom cannot form enolates and thus cannot undergo Aldol condensation. Instead, in the presence of concentrated alkali (50%NaOH), they undergo the Cannizzaro Reaction.
- Nature: It is a Self-Redox (Disproportionation) reaction.
- Process: One molecule is reduced to an alcohol, while another molecule is oxidized to the salt of a carboxylic acid.
- Examples: Formaldehyde (HCHO) and Benzaldehyde (C6H5CHO).
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing oxygen
- Topic
- cannizzaro reaction
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Aldehydes without α-hydrogen
Aldehydes that lack an α-hydrogen atom cannot form enolates and thus cannot undergo Aldol condensation. Instead, in the presence of concentrated alkali (50%NaOH), they undergo the Cannizzaro Reaction.
- Nature: It is a Self-Redox (Disproportionation) reaction.
- Process: One molecule is reduced to an alcohol, while another molecule is oxidized to the salt of a carboxylic acid.
- Examples: Formaldehyde (HCHO) and Benzaldehyde (C6H5CHO).
This medium difficulty chemistry question is from the chapter organic compounds containing oxygen, covering the topic of cannizzaro reaction. It appeared in the 2025 exam.
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