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Friday, 9 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 September 2020, Shift 1, Physics Q9

Question 9 of 75 in this shift, Physics question 9 of 25.

A 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 be rigid, the total internal energy (in units of RTRT) of the mixture is :
  1. (1)11
  2. (2)13
  3. (3)15Official answer
  4. (4)20

Official answer

Option 3

NTA final key (Sep 2020).

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

Same idea in other shifts

Asked 2× in all
  1. 31 Jan 2024, Shift 2 · Q39A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational modes, the total internal…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.