MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Grignard reagents react with carbonyl compounds to form addition products which on hydrolysis yield alcohols. Formaldehyde ( HCHO ) reacts with Grignard reagents to form primary alcohols. Other aldehydes (such as CH _3 CHO and CH _3 -CH _2 -CHO ) react with Grignard reagents to form secondary alcohols. Ketones (such as CH _3 - CO - CH _3) react with Grignard reagents to form tertiary alcohols. The reaction proceeds as follows: CH _3 - CO - CH _3 + RMgX CH _3 - C ( R )( OMgX ) - CH _3 CH _3 - C ( R )( OMgX ) - CH _3 + H _2 O CH _3 - C ( R )( OH ) - CH _3 + Mg ( OH ) X The final product is a tertiary alcohol. Answer: CH _3 - CO - CH _3