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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 1 February 2024, Shift 1, Chemistry Q63

Question 63 of 90 in this shift, Chemistry question 3 of 30, Section A.

Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
  1. (1)q=0, ΔT≠0, w=0\mathrm{q = 0,\ \Delta T \neq 0,\ w = 0}
  2. (2)q≠0, ΔT=0, w=0\mathrm{q \neq 0,\ \Delta T = 0,\ w = 0}
  3. (3)q=0, ΔT=0, w=0\mathrm{q = 0,\ \Delta T = 0,\ w = 0}Official answer
  4. (4)q=0, ΔT<0, w≠0\mathrm{q = 0,\ \Delta T < 0,\ w \neq 0}

Official answer

Option 3

NTA final key.

Chapter
Thermodynamics (Chemistry)
Topic
Thermodynamic Processes
Idea tested
Free Expansion of Ideal Gas

Same idea in other shifts

Asked 2× in all
  1. 28 Jun 2022, Shift 1 · Q844.0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 20 L. The amount of heat absorbed in this…EasyNumerical 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.