Question:

The gas evolved on heating \(\mathrm{CH_3MgBr}\) in methanol is :

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Grignard reagents are strong bases and react with any compound having an acidic hydrogen (such as an alcohol) to give an alkane.
Updated On: Nov 11, 2026
  • HBr
  • Methane
  • Ethane
  • Propane
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The Correct Option is B

Solution and Explanation

The Grignard reagent \(\mathrm{CH_3MgBr}\) has a strongly basic carbanion-like carbon.
Methanol has an acidic O-H hydrogen, so the reagent is protonated: \(\mathrm{CH_3MgBr + CH_3OH \to CH_4 \uparrow + Mg(OCH_3)Br}\).
The gas evolved is methane.
Answer: (2) Methane
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