In the Cannizzaro reaction, one molecule of the aldehyde is reduced while the other is:
Correct answer: C. Oxidized
- A. Halogenated
- B. Dehydrated
- C. Oxidized
- D. Unchanged
Explanation
The Cannizzaro reaction is a redox disproportionation reaction that occurs with aldehydes lacking α-hydrogens in the presence of a strong base. One molecule of the aldehyde is reduced to the corresponding primary alcohol, while another molecule is oxidized to a carboxylate salt.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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