Reaction of ethylmagnesium bromide with which of the following compounds yields a secondary alcohol after quenching with aqueous acid? A) H₂CO B) CH₃CHO C) (CH₃)₂CO D) ethylene oxide E) n-butyllithium

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Ethylmagnesium bromide is a Grignard reagent that reacts with aldehydes to form secondary alcohols. CH₃CHO (acetaldehyde) is an aldehyde, and its reaction with ethylmagnesium bromide followed by acid quenching yields a secondary alcohol.

Reaction of Ethylmagnesium Bromide with Which of the Following Compounds