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JEE Main202430 Jan 2024Evening ShiftChemistryAldehydes and KetonesActual

m-chlorobenzaldehyde on treatment with 50 % KOH solution yields

Correct answer

3

Step-by-step solution

Meta–chlorobenzaldehyde will undergo Cannizzaro reaction with 50 % KOH to give mchlorobenzoate ion and m - chlorobenzyl alcohol. Since m - chlorobenzaldehyde does not contain α hydrogen thus with 50 % KOH it undergoes the Cannizzaro reaction. The Cannizzaro reaction for the m - chlorobenzaldehyde is given as: Since it is a disproportionation reaction so one molecule of m - chlorobenzaldehyde is reduced to m - chlorobenzyl alcohol at the cost of others which is oxidized potassium m - chlorobenzoate.

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