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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 11 April 2023, Shift 1, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

Three vessels of equal volume contain gases at the same temperature and pressure. The first vessel contains neon (monoatomic), the second contains chlorine (diatomic) and third contains uranium hexafluoride (polyatomic). Arrange these on the basis of their root mean square speed (vrmsv_{rms}) and choose the correct answer from the options given below:
  1. (1)vrmsv_{rms} (mono) > vrmsv_{rms} (dia) > vrmsv_{rms} (poly)Official answer
  2. (2)vrmsv_{rms} (mono) < vrmsv_{rms} (dia) < vrmsv_{rms} (poly)
  3. (3)vrmsv_{rms} (mono) = vrmsv_{rms} (dia) = vrmsv_{rms} (poly)
  4. (4)vrmsv_{rms} (dia) < vrmsv_{rms} (poly) < vrmsv_{rms} (mono)

Official answer

Option 1

NTA final key.

Chapter
Kinetic Theory
Topic
Kinetic Theory of Gases
Idea tested
Molecular Speed Types

Same idea in other shifts

Asked 3× in all
  1. 28 Jul 2022, Shift 1 · Q38Given below are two statements : Statement I : The average momentum of a molecule in a sample of an ideal gas depends on temperature.…MediumTwo statements
  2. 24 Jun 2022, Shift 1 · Q510.056 kg of Nitrogen is enclosed in a vessel at a temperature of 127∘127^\circC. The amount of heat required to double the speed of its…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 42 of the 174 JEE Main shifts held from 2017 to 2026.