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JEE Main Chemistry question

ChemistryHaloalkanes and HaloarenesJEE Main

How many of the following compounds, on reaction with a Grignard reagent, yield primary alcohols? , ethylene oxide, , , , cyclohexanone, .

Answer: 2

Solution

A Grignard reagent gives a primary alcohol only when it adds to a carbonyl carbon bearing just hydrogens (no carbon substituents), which is the case for formaldehyde-type substrates and for ethylene oxide (whose ring-opening also installs the new carbon on a terminal

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Question ID VK-149029