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Saturday, 31 October

JEE Main · Physics · Kinetic Theory

Molecular Speed Types

JEE Main asked Molecular Speed Types 12 times in 12 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to Kinetic Theory of Gases, in Kinetic Theory (Physics). The longest wait between two years asking it was 1 year. In 2021, 2022 and 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
12
in 12 shifts
Years
3 of 8
First asked
2021
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.150.30’170’200.07’210.21’220.28’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 6 in 24 shifts · 2023: 4 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20234 of 12
  • 20226 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

  • Rms speed after temperature change
  • Order/ranking of rms speed of gases

Difficulty

Easy 9Medium 3Hard 0

2 of the 12 questions had a numerical answer.

Every question

All 12 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 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
  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. 11 Apr 2023, Shift 1 · Q43Three vessels of equal volume contain gases at the same temperature and pressure. The first vessel contains neon (monoatomic), the second…EasySingle correct
  4. 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
  5. 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
  6. 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
  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. 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
  9. 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
  10. 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
  11. 24 Feb 2021, Shift 2 · Q24The root mean square speed of molecules of a given mass of a gas at 27∘C27^\circ\mathrm{C} and 1 atmosphere pressure is…EasyNumerical value
  12. 26 Aug 2021, Shift 1 · Q2The rms speeds of the molecules of Hydrogen, Oxygen and Carbondioxide at the same temperature are VHV_H, VOV_O and VCV_C respectively then :EasySingle correct

Shifts: 24 Feb 2021, Shift 2, 26 Aug 2021, Shift 1, 24 Jun 2022, Shift 1, 27 Jul 2022, Shift 1, 28 Jul 2022, Shift 2, 28 Jul 2022, Shift 1, 29 Jul 2022, Shift 2, 30 Jul 2022, Shift 2, 6 Apr 2023, Shift 2, 11 Apr 2023, Shift 2, 11 Apr 2023, Shift 1, 12 Apr 2023, Shift 1.

Same topic

Other ideas in Kinetic Theory of Gases

Kinetic Theory of Gases has 22 ideas JEE Main has asked; 14 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas