Q. Ketone upon treatment with Grignard reagent gives

 1798  196 UPSEEUPSEE 2009 Report Error

Solution:

Ketones give an addition product having more number of carbon atoms with Grignard reagent, which on hydrolysis gives an alcohol .

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Formaldehyde gives primary alcohol with Grignard reagent while any other aldehyde except formaldehyde give secondary alcohol.