JEE Main202124 Feb 2021Evening ShiftChemistryAldehydes and KetonesActual

Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO 4 and H 2 SO 4 ?

Correct answer

Step-by-step solution

Reaction of HgSO 4 / dil . H 2 SO 4 with alkyne gives addition of water as per markonikoff's rule. CH ≡ CH   → H 2 O HgSO 4 , H 2 SO 4   CH 3 CHO Hence, by this process preparation of CH 3 CH 2 CHO Cann't possible. Hence CH 3 - CH 2 - CHO cannot be formed.

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