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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceOtherEasyConceptual

JEE Main 27 July 2022, Shift 1, Physics Q39

Question 39 of 90 in this shift, Physics question 9 of 30, Section A.

Same 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 r.m.s. velocity of gas molecules in two vessels will be the same. B. The ratio of pressure in these vessels will be 1:4. C. The ratio of pressure will be 1:1. D The r.m.s. velocity of gas molecules in two vessels will be in the ratio of 1:4. Choose the correct answer from the options given below :
  1. (1)A and C only
  2. (2)B and D only
  3. (3)A and B onlyOfficial answer
  4. (4)C and D only

Official answer

Option 3

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 1 · Q43Three vessels of equal volume contain gases at the same temperature and pressure. The first vessel contains neon (monoatomic), the second…EasySingle correct
  3. 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
  4. 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
  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.