Logo
Jeeify
NVAMediumJEE 2026Isomerism (Structural, Stereoisomerism)

JEE Chemistry 2026 Question with Solution

Consider all the structural isomers with molecular formula C3H5Br\mathrm{C_3H_5Br} are separately treated with KOH(aq)\mathrm{KOH(aq)} to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is _____.

Answer

Correct answer:3

Step-by-step solution

Standard Method

Given: Structural isomers of C3H5Br\mathrm{C_3H_5Br} are treated separately with KOH(aq)\mathrm{KOH(aq)} to form substitution products without rearrangement.

Find: The number of substitution products that can exhibit optical isomerism.

The solution is internally inconsistent: the step-by-step discussion concludes 00, but the solution's explicitly lists Correct Answer: 33. As the extracted answer is 33, while noting that the displayed working does not support it.

Common mistakes

  • Counting only the open-chain isomers and ignoring cyclic structural isomers is incorrect. For a formula with one degree of unsaturation, both double-bond and ring possibilities must be checked.

  • Assuming every alcohol product is optically active is incorrect. Optical isomerism requires a valid chirality element, usually a carbon attached to four different groups.

  • Relying on the final paragraph of the displayed working without checking the source answer can be misleading here, because the solution text contradicts the listed correct answer.

Practice more Isomerism (Structural, Stereoisomerism) questions

Get unlimited AI-adaptive practice, mastery tracking, and an AI tutor that explains every step — free to start.

Start free trialMore on Isomerism (Structural, Stereoisomerism)

Related questions