NEET UG 2020 · Physics · Question 139
NEET 2020 Physics, question 139
Question 139 of the NEET 2020 paper (code E1) is a Physics question from Kinetic Theory. Its idea, Ideal Gas Equation, was asked 5 times, in 2020, 2022, 2024 and 2025, across NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q139 · Physics
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C.
Its density is : (R = 8.3 J mol K)
- 10.5 kg/m
- 20.2 kg/mOfficial answer
- 30.1 kg/m
- 40.02 kg/m
Official answer: option 2 · NTA final answer key
Same idea
Ideal Gas Equation, in other papers
NEET asked this idea 5 times, in 2020, 2022, 2024 and 2025. The other 4 questions below.
- 2025 Q14An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure…Numerical · Medium
- 2025 Q29A container has two chambers of volumes = 2 litres and = 3 litres separated by a partition made of a thermal insulator. The…Numerical · Medium
- 2024 Q47The following graph represents the T-V curves of an ideal gas (where T is the temperature and V the volume) at three pressures ,…Figure-based · Medium
- 2022 Q44The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is :Numerical · Medium
The chapter
Kinetic Theory in ten years of NEET
14 questions from 2017–2026, asked in 10 of 10 papers, about 1.4 a paper. Kinetic Theory of Gases alone had 14.