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Friday, 9 October

NEET UG 2025 · Chemistry · Question 49

NEET 2025 Chemistry, question 49

Question 49 of the NEET 2025 paper (code 45) is a Chemistry question from Amines. Its idea, Mendius Reduction Reaction, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q49 · Chemistry

Predict the major product 'P' in the following sequence of reactions -

1-Methylcyclopentene →(i) HBr, benzoyl peroxide; (ii) KCN; (iii) Na(Hg)/C2H5OH\xrightarrow{\text{(i) HBr, benzoyl peroxide; (ii) KCN; (iii) Na(Hg)/C}_2\text{H}_5\text{OH}} P (Major)

The figure, described in words

Reactant drawn as 1-methylcyclopentene; all four options are drawn cyclopentane structures.

  1. 1[structure: cyclopentane with CH3 and CH2NH2 on adjacent carbons ((2-methylcyclopentyl)methanamine)]Official answer
  2. 2[structure: cyclopentane with CH3 and CH2NH2 on the same carbon]
  3. 3[structure: cyclopentane with CH3 and NC (isocyanide) on adjacent carbons]
  4. 4[structure: cyclopentane with NC (isocyanide) and CH3 on the same carbon]

Official answer: option 1 · NTA final answer key

Same idea

The only question on Mendius Reduction Reaction

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

Mendius Reduction Reaction: every question and how it was framed

The chapter

Amines in ten years of NEET

18 questions from 2017–2026, asked in 10 of 10 papers, about 1.7 a paper. Amines and Diazonium Salts alone had 18.

Amines: questions per paper

0242’171’181’191’202’212’222’232’243’252’26