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Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

m–chlorobenzaldehyde on treatment with 50%\% KOH solution yields

A

Fig 1

B

Fig 2

C

Fig 3

D

Fig 4

Answer

Fig 2

Explanation

Solution

Solution: When m -chlorobenzaldehyde is treated with 50% KOH solution, it undergoes a reaction known as the Cannizzaro reaction, which occurs in aldehydes that do not have alpha hydrogens.

Cannizzaro Reaction: In the Cannizzaro reaction, an aldehyde is converted into a carboxylic acid and an alcohol in the presence of a strong base, like KOH. The reaction mechanism involves the disproportionation of the aldehyde, leading to the formation of the corresponding carboxylate and alcohol.

Reaction Process: For m -chlorobenzaldehyde, the reaction can be summarized as follows:

2 m -chlorobenzaldehyde + 50% KOH -> m -chlorobenzoate + m -chlorobenzyl alcohol.

Final Products: The final products of the reaction are m -chlorobenzoate ion and m -chlorobenzyl alcohol.

Thus, the correct product obtained from the reaction is: chlorobenzoate and m -chlorobenzyl alcohol.