NEET UG 2021 · Chemistry · Question 91
NEET 2021 Chemistry, question 91
Question 91 of the NEET 2021 paper (code O1) is a Chemistry question from Solutions. Its idea, Raoult's Law and Vapour Pressure, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q91 · Chemistry
The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3 : 2 is :
[At 45°C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]
- 1336 mm of HgOfficial answer
- 2350 mm of Hg
- 3160 mm of Hg
- 4168 mm of Hg
Official answer: option 1 · NTA final answer key
Same idea
The only question on Raoult's Law and Vapour Pressure
No other NEET paper from 2017–2026 tested this exact idea.
Raoult's Law and Vapour Pressure: every question and how it was framed
The chapter
Solutions in ten years of NEET
16 questions from 2017–2026, asked in 8 of 10 papers, about 1.6 a paper. Solutions and Colligative Properties alone had 16.