Aldehydes Ketones Question 121
Question: Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as
[KCET 2005]
Options:
A) Perkin’s reaction
B) Cannizzaro’s reaction
C) Sandmeyer’s reaction
D) Claisen condensation
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Answer:
Correct Answer: B
Solution:
Benzaldehyde on treatment with 50% aqueous or ethanolic alkali solution undergoes Cannizzaro’s reaction like $ HCHO $ (no $ \alpha $ -hydrogen atom) i.e., one molecule is oxidised and one is reduced with the formation of benzoic acid and benzyl alcohol respectively. $ 2C_6H_5CHO\xrightarrow{NaOH}C_6H_5CH_2OH+C_6H_5COONa $
BETA
