NEET UG 2025 · Chemistry · Question 77
NEET 2025 Chemistry, question 77
Question 77 of the NEET 2025 paper (code 45) is a Chemistry question from Hydrocarbons. Its idea, Bromine Water Test for Unsaturation, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q77 · Chemistry
Which one of the following compounds does not decolourize bromine water?
The figure, described in words
Options drawn as ring structures: plain hexagon (cyclohexane), benzene–OH, benzene–CH=CH2, benzene–NH2.
- 1[structure: cyclohexane]Official answer
- 2[structure: phenol, C6H5–OH]
- 3[structure: styrene, C6H5–CH=CH2]
- 4[structure: aniline, C6H5–NH2]
Official answer: option 1 · NTA final answer key
Same idea
The only question on Bromine Water Test for Unsaturation
No other NEET paper from 2017–2026 tested this exact idea.
Bromine Water Test for Unsaturation: 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.