Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :

1. Isopropyl alcohol

2. Sec. butyl alcohol

3. Tert. butyl alcohol

4. Isobutyl alcohol

Doubtly Asked 30 Oct 2026 NEET UG 2020 Practice test neet Save WhatsApp Report

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Answer: 3. Tert. butyl alcohol

Grignard reagents add to the carbonyl group. A ketone gives a tertiary alcohol after hydrolysis.

$$\mathrm{(CH_3)_2C{=}O + CH_3MgCl \rightarrow (CH_3)_3C{-}OMgCl \xrightarrow{H_2O} (CH_3)_3C{-}OH}$$

The product is tert-butyl alcohol, option (3). (Formaldehyde would give a primary alcohol, other aldehydes a secondary alcohol.)

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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