Question

Which will form hydrocarbon with Grignard reagent? 

(a) CH₃CHO 

(b) CH₃CH₂OH 

(c) CH₃COCH₃ 

(d) CH₃COOCH₃

Answer 1

(b) CH₃CH₂OH 

Grignard reagent forms hydrocarbon when treated with compound containing active hydrogen atom, viz. CH₃CH₂OH. Note that CH₃CHO, CH₃.CO.CH₃, and CH₃COOCH₃ do not contain active hydrogen atom (a hydrogen atom attached to electronegative element like O, N and S is called active).