Consider the following reaction sequences and choose the correct option. L Na/liq. NH3 Ph–C≡C–Me →(H2, Pd/C) K L →(HBr, benzoyl peroxide) N K →(HBr) M

NEET UG 2026 · Chemistry · Question 77

NEET 2026 Chemistry, question 77

Question 77 of the NEET 2026 paper (re-exam) is a Chemistry question from Hydrocarbons. Its idea, Lindlar's Catalyst Reduction, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q77 · Chemistry

\xleftarrow{\text{Na/liq. NH}_3}

Printed as a drawing

Stem reaction-scheme diagram: Ph-C=C-Me branching with Na/liq NH3 to L and H2/Pd-C (Lindlar) to K, then HBr (benzoyl peroxide) to N and HBr to M; drawn as a flow scheme of typed formulas (borderline, no skeletal structures).

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

Official answer: option 1 · NTA final answer key

Same idea

The only question on Lindlar's Catalyst Reduction

No other NEET paper from 2017–2026 tested this exact idea.

Lindlar's Catalyst Reduction: every question and how it was framed

The chapter

Hydrocarbons in ten years of NEET

25 questions from 2017–2026, asked in 10 of 10 papers, about 2.4 a paper. Hydrocarbons (Alkenes) alone had 12.

Chapter analysis Study this chapter Practise this chapter

The only question on Lindlar's Catalyst Reduction

Hydrocarbons in ten years of NEET

Hydrocarbons: questions per paper