See image — Haloalkanes and Haloarenes Chemistry Question

💡 Solution & Explanation

Correct answer: \(\text{D}\). For substitution, \(\mathrm{S_N1}\) follows carbocation stability and may rearrange/racemise; \(\mathrm{S_N2}\) requires backside attack and gives inversion. Recovered question text: 20. An SN2 reaction at an asymmetric carbon of a compound always gives: (a) an enantiomer of the substrate (b) a product with opposite optical rotation (c) a mixture of diastereomers (d) a single stereoisomer