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Chemistry · PYQ NEET UG 2026

हिन्दी

Consider the following reaction sequences and choose the correct option.

  1. K and L are geometrical isomers
  2. K and L are enantiomers
  3. M and N are geometrical isomers
  4. M and N are stereoisomers

Correct answer · Option 3

M and N are geometrical isomers

Explanation

Reduction of alkyne with Na/liq. NH3 gives trans-alkene (L) while with Lindlar's catalyst gives cis-alkene (K). Subsequent addition of HBr to cis and trans alkenes yields diastereomers (M and N), which are geometrical isomers.
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