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Saturday, 31 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 12× in all
  1. 6 Apr 2023, Shift 2 · Q39The temperature of an ideal gas is increased from 200 K to 800 K. If r.m.s. speed of gas at 200 K is v0v_0. Then, r.m.s. speed of the gas…EasySingle correct
  2. 11 Apr 2023, Shift 2 · Q32The root mean square speed of molecules of nitrogen gas at 27∘C27^\circ\mathrm{C} is approximately : (Given mass of a nitrogen molecule =…EasySingle correct
  3. 12 Apr 2023, Shift 1 · Q39If the r. m. s speed of chlorine molecule is 490 m/s at 27∘27^\circC, the r. m. s speed of argon molecules at the same temperature will be…EasySingle correct
  4. 27 Jul 2022, Shift 1 · Q39Same gas is filled in two vessels of the same volume at the same temperature. If the ratio of the number of molecules is 1:4, then A. The…EasyOther
  5. 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
  6. 28 Jul 2022, Shift 2 · Q8A vessel contains 14 g of nitrogen gas at a temperature of 27∘27^\circC. The amount of heat to be transferred to the gas to double the…MediumSingle correct
  7. 29 Jul 2022, Shift 2 · Q49The root mean square speed of smoke particles of mass 5×10−175\times10^{-17} kg in their Brownian motion in air at NTP is approximately. [Given…EasySingle correct
  8. 30 Jul 2022, Shift 2 · Q8If the r.m.s speed of oxygen at room temperature is 56 m/s\sqrt{56}\ \mathrm{m/s}. The r.m.s speed of nitrogen at the same temperature is…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 108 of the 174 JEE Main shifts held from 2017 to 2026.