Ketone reacts with Grignard reagent to form _ in acidic media?
Correct answer: A. Tertiary alcohol
- A. Tertiary alcohol
- B. Isopropyl alcohol
- C. Primary alcohol
- D. Carboxylic acid
Explanation
The correct answer is a tertiary alcohol. When a ketone, which has a carbonyl group (C=O) bonded to two carbon-containing groups, reacts with a Grignard reagent, the carbonyl carbon gets attacked. This nucleophilic addition forms an alkoxide intermediate. Upon protonation in acidic conditions, the alkoxide converts into an alcohol. As the carbonyl carbon is already attached to two other carbon groups, the alcohol formed is tertiary.Isopropyl alcohol is incorrect as it forms from acetaldehyde, not a ketone. A primary alcohol is produced from formaldehyde, and a carboxylic acid forms from carbon dioxide with Grignard reagents, making these options irrelevant for this reaction.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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