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JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2026, Shift 2, Physics Q35

Question 35 of 75 in this shift, Physics question 10 of 25, Section A.

If 2 mole of an ideal monoatomic gas at temperature

T

, is mixed with 6 mole of another ideal monoatomic gas at temperature

2T

then the temperature of mixture is :

(1) $\frac{5}{2}T$
(2) $\frac{5}{4}T$
(3) $\frac{7}{2}T$
(4) $\frac{7}{4}T$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Thermodynamics
Topic: First Law of Thermodynamics
Idea tested: Internal Energy Calculation

Same idea in other shifts

Asked 2× in all

3 Aug 2021, Shift 2 · Q3One mole Argon gas is sealed inside a thermally isolated chamber of 1 litre. A 100 W heater kept inside the chamber is switched on for 30…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.