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Saturday, 10 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 4 April 2025, Shift 2, Physics Q45

Question 45 of 75 in this shift, Physics question 20 of 25, Section A.

There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel contains the gas at 8 kPa at 1000 K while the smaller vessel contains the gas at 7 kPa at 500 K. If the vessels are connected to each other by a thin tube allowing the gas to flow and the temperature of both vessels is maintained at 600 K, at steady state the pressure in the vessels will be (in kPa).
  1. (1)6Official answer
  2. (2)4.4
  3. (3)18
  4. (4)24

Official answer

Option 1

NTA final key.

Chapter
Kinetic Theory
Topic
Ideal Gas Laws
Idea tested
Connected Gas Bulbs Equilibrium

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2026, Shift 1 · Q35Two closed vessels of same volume are joined through a narrow tube and both vessels are filled with air of pressure 90 kPa and temperature…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.