Home/
Competitive Exams/
JEE Main & Advanced/
Chemistry/
Hydrocarbons/
Question 770014
JEE Chemistry · Hard

Hydrocarbons: Mixed MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
MixedHardQuestion 770014

Question

Lindlar's catalyst reduces alkynes to:
  1. A
    cis-alkenes
    Correct
  2. B
    trans-alkenes
  3. C
    alkanes
  4. D
    alcohols

Correct answer

cis-alkenes

Explanation

Lindlar's catalyst (Pd on CaCO₃, poisoned with lead acetate and quinoline) selectively reduces alkynes to cis (Z) alkenes via syn addition of H₂. Sodium in liquid NH₃ gives trans alkenes.

Review Hydrocarbons notesStart timed chapter practice