JEE Advanced · 2019 · 27 May 2019 · Paper 2 · Hydrocarbons

Which of the following reactions produce(s) propane as a major product?

Answer: (B), (C)

Solution

Propane (

C_{3} H_{8}

) is produced by:

Option (B): Clemmensen reduction (Zn-Hg/HCl) of a ketone reduces the carbonyl to $- CH_{2} -$ , yielding propane.
Option (C): Wolff-Kishner reduction ( $NH_{2} NH_{2}$ , KOH, heat) also reduces the carbonyl to $- CH_{2} -$ , producing propane.

Options (A) and (D) do not produce propane as the major product under the given conditions.

JEE Advanced · 2019 · 27 May 2019 · Paper 2 · One or more correct options