MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Enantiomers are defined as stereoisomers that are non-superimposable mirror images of each other. Therefore, the statement that enantiomers are superimposable mirror images is false. In an S_N1 reaction, the formation of a planar carbocation intermediate allows the nucleophile to attack from either face with equal probability, generally yielding a 1:1 mixture of enantiomers (a racemic mixture). A racemic mixture contains equal amounts of dextrorotatory and levorotatory enantiomers, resulting in zero net optical rotation. In an S_N2 reaction at a chiral center, the nucleophile attacks from the side opposite to the leaving group, leading to a complete inversion of configuration. Answer: Enantiomers are superimposable mirror images of each other