Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Ans. (C)

Sol. (A) 3-methylpent-1-ene: chiral centre present (optical isomerism yes) but a terminal alkene, so no geometrical isomerism. (B) 2-methylpent-2-ene: the double bond carries two different groups on each carbon, so it shows geometrical isomerism, but there is no chiral centre, so no optical isomerism. (C) 4-methylhex-2-ene: the C₂=C₃ double bond gives geometrical isomerism and C₄ is a chiral centre (optical isomerism) - it shows both. (D) 4-methylpent-1-ene: terminal alkene (no GI) and C₄ carries two identical methyl groups (no chiral centre, no OI).