See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Analysis of the Compound's Stereochemistry **Identify the structure:** The compound shown is $1,2$-dichloropropane with two different $Cl$ atoms and a methyl group attached to a two-carbon chain. **Check for chiral centers:** The central carbon (middle of the three-carbon unit) is bonded to: - Two different $Cl$ atoms - An $H$ atom - A $CH_3$ group This carbon has **four different groups**, making it a chiral center. **Analyze symmetry properties:** - **Centre of symmetry (B)?** No — the molecule lacks a point of inversion symmetry - **Plane of symmetry (C)?** No — the asymmetric arrangement of $Cl$ atoms and $CH_3$ prevents any mirror plane - **Axis of symmetry (D)?** No — rotation about any axis doesn't superimpose the molecule on itself **Optical activity (A):** Since the molecule contains **one chiral center with no compensating symmetry elements**, it exists as a single enantiomer that rotates plane-polarized light. The compound is **optically active**. **Answer: (A) — The compound is optically active**