The gas evolved on heating CH _3 MgBr in methanol is:

JEE Main 2016 Chemistry question

The gas evolved on heating in methanol is:

(1)MethaneCorrect
(2)Ethane
(3)Propane
(4)HBr

Answer: (1)

Solution

A Grignard reagent contains a strongly polarised bond, so the methyl group behaves as a carbanion and is a very powerful base. Methanol has an acidic proton, which the carbanion seizes immediately:

CH_3MgBr + CH_3OH →

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Question ID VK-115548