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Friday, 9 October

NEET UG 2019 · Chemistry · Question 55

NEET 2019 Chemistry, question 55

Question 55 of the NEET 2019 paper (code P1) is a Chemistry question from Hydrocarbons. Its idea, Controlled Hydrogenation (Cis/Trans), was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q55 · Chemistry

The most suitable reagent for the following conversion, is :

H3C−C≡C−CH3→H_3C-C\equiv C-CH_3 \to cis-2-butene

The figure, described in words

Product drawn as cis-2-butene (both CH3 on same side of C=C).

  1. 1Na / liquid NH3NH_3
  2. 2H2H_2, Pd/C, quinolineOfficial answer
  3. 3Zn / HCl
  4. 4Hg2+/H+Hg^{2+}/H^+, H2OH_2O

Official answer: option 2 · NTA final answer key

Same idea

The only question on Controlled Hydrogenation (Cis/Trans)

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

Controlled Hydrogenation (Cis/Trans): 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 (Alkynes) alone had 4.

Hydrocarbons: questions per paper

0363’171’182’192’204’212’222’231’245’253’26