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Saturday, 31 October

JEE Main 2020 · PhysicsNumerical answerNumerical valueHardMulti-step

JEE Main 4 September 2020, Shift 2, Physics Q22

Question 22 of 75 in this shift, Physics question 22 of 25.

The change in the magnitude of the volume of an ideal gas when a small additional pressure ΔP\Delta P is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity ΔT\Delta T at constant pressure. The initial temperature and pressure of the gas were 300 K and 2 atm. respectively. If ∣ΔT∣=C∣ΔP∣|\Delta T| = C|\Delta P| then value of C in (K/atm.) is __________.

Official answer

150.00

NTA final key (Sep 2020).

Chapter
Kinetic Theory
Topic
First Law of Thermodynamics
Idea tested
Isothermal Bulk Modulus

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2026, Shift 1 · Q50A certain gas is isothermally compressed to (13)rd\left(\frac{1}{3}\right)^{\mathrm{rd}} of its initial volume (V0=3V_0=3 litre) by applying…MediumNumerical value

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 108 of the 174 JEE Main shifts held from 2017 to 2026.