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Friday, 9 October

NEET UG 2025 · Physics · Question 14

NEET 2025 Physics, question 14

Question 14 of the NEET 2025 paper (code 45) 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 3.

Updated 2026-10-08

Q14 · Physics

An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressure at temperature 27°C. The mass of the oxygen withdrawn from the cylinder is nearly equal to :

[Given, R=10012R = \frac{100}{12} J mol−1^{-1}K−1^{-1}, and molecular mass of O2O_2 = 32, 1 atm pressure = 1.01×1051.01\times10^5 N/m]

  1. 10.125 kg
  2. 20.144 kg
  3. 30.116 kgOfficial answer
  4. 40.156 kg

Official answer: option 3 · 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 Q29A container has two chambers of volumes V1V_1 = 2 litres and V2V_2 = 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 P1P_1,…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
  • 2020 Q139A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is : (R = 8.3 J mol−1^{-1} K−1^{-1})Numerical · Easy

Ideal Gas Equation: every question and how it was framed

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.

Chapter analysisStudy this chapterPractise this chapter

Kinetic Theory: questions per paper

0241’171’181’193’201’211’221’231’242’252’26