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JEE Main20268 April 2026Evening ShiftChemistryAldehydes and KetonesActual

Consider the following reaction. The major product (P) formed is:

Correct answer

2

Step-by-step solution

The reaction sequence proceeds as follows: The reagent NaBH ₄ is a mild reducing agent that selectively reduces the aldehyde group ( - CHO ) to a primary alcohol ( - CH ₂ OH ). The lactam (cyclic amide) ring remains unaffected. Heating with aqueous NaOH causes the base-catalyzed hydrolysis of the lactam ring. The amide bond breaks, forming a carboxylate salt ( - COO ^- ) and a secondary amine ( - NH - ). Acidification with H ₃ O ^+ protonates the carboxylate ion to form a carboxylic acid ( - COOH ). The final produ

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