MHT CET 2025 Chemistry question

Which of the following on reaction with Grignards reagent followed by hydrolysis forms tertiary alcohol?

(A)Methanal
(B)Ethanal
(C)Propanal
(D)PropanoneCorrect

Answer: (D)

Solution

Grignard reagent adds to the carbonyl group, and hydrolysis of the adduct gives an alcohol. Methanal (HCHO) gives a primary alcohol (A). Any other aldehyde, such as ethanal (B) or propanal (C), gives a secondary alcohol, e.g.

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Question ID VK-103281