Chemistry - STEREO ISOMERISM Question with Solution | TestHub

(a) CIP priorities : left carbon C₂H₅ $>$ CH₃; right carbon Cl $>$ CH₂OH. The higher groups (C₂H₅ and Cl) are on the same side.

Ans. Z

(b) Left carbon Cl $>$ OCH₃; right carbon n-C₃H₇ $>$ C₂H₅ (at the second atom (C, H, H) beats (H, H, H)). The higher groups (Cl and n-C₃H₇) are on opposite sides.

Ans. E

(c) Right carbon CO₂H $>$ CH₂OH ((O, O, O) beats (O, H, H)). On the ring carbon the path through C-2 (leading to the CH₃-bearing C-3) outranks the path through C-5. The higher path and CO₂H are on the same side.

Ans. Z

(d) Left carbon CH₃ $>$ H; right carbon CN $>$ CH₂NH₂ ((N, N, N) beats (N, H, H)). The higher groups (CH₃ and CN) are on opposite sides.

Ans. E