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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 31 January 2024, Shift 2, Physics Q39

Question 39 of 90 in this shift, Physics question 9 of 30, Section A.

A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational modes, the total internal energy of the system is:
  1. (1)21 RT
  2. (2)27 RTOfficial answer
  3. (3)29 RT
  4. (4)20 RT

Official answer

Option 2

NTA final key.

Chapter
Thermodynamics
Topic
Kinetic Theory of Gases
Idea tested
Internal Energy of Gas Mixtures

Same idea in other shifts

Asked 2× in all
  1. 2 Sep 2020, Shift 1 · Q9A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature TT. Assuming the gases to be ideal and the oxygen bond to…EasySingle 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.