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Question 790005
JEE Chemistry · Medium

Aldehydes, Ketones and Carboxylic Acids: Cannizzaro reaction MCQ

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Cannizzaro reactionMediumQuestion 790005

Question

Cannizzaro reaction occurs with aldehydes that have:
  1. A
    No α-hydrogen (like HCHO, PhCHO)
    Correct
  2. B
    α-hydrogen
  3. C
    Two carbonyl groups
  4. D
    Ketones only

Correct answer

No α-hydrogen (like HCHO, PhCHO)

Explanation

Cannizzaro reaction: aldehyde with no α-H undergoes disproportionation with conc. NaOH → one molecule oxidised to carboxylate, another reduced to alcohol. 2HCHO → HCOO⁻ + CH₃OH.

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