Answer :
Final answer:
The reaction between a Grignard reagent and acetone forms a (a) tertiary alcohol. This happens due to the Grignard reagent's ability to add to the carbonyl component of the acetone, thereby creating a new carbon-carbon bond and converting the carbonyl to an alcohol function.
Explanation:
The Grignard reagent on reaction with acetone forms a tertiary alcohol. This reaction involves the addition of the Grignard reagent, which acts as a nucleophile, to the carbonyl group in acetone, which acts as an electrophile. The result is a new carbon-carbon bond, as well as the conversion of the carbonyl group to an alcohol function. The tertiary alcohol is formed because the Grignard reagent adds to the carbonyl component of acetone, which already has two other carbons attached. Thus, the original question, if Grignard reagent on reaction with acetone forms (a) tertiary alcohol (b) secondary alcohol (c) acetic acid (d) acetaldehyde, is correctly answered with option (a) tertiary alcohol.
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