MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Ethyl methyl ketone is CH _3- CO - C _2 H _5. When it reacts with the Grignard reagent CH _3 MgBr , the nucleophilic methyl group attacks the electrophilic carbonyl carbon to form an intermediate alkoxide. CH _3- CO - C _2 H _5 + CH _3 MgBr CH _3- C ( OMgBr )( CH _3)- C _2 H _5 Upon hydrolysis, the alkoxide is protonated to yield a tertiary alcohol. CH _3- C ( OMgBr )( CH _3)- C _2 H _5 H _2 O C _2 H _5- C ( CH _3)_2- OH + Mg ( OH ) Br The final product is 2-methylbutan-2-ol, which matches the structure C _2 H _5 - CH _3 | CH _3 | C - OH . Answer: C _2 H _5 - CH _3 | CH _3 | C - OH