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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceTwo statementsMediumConceptual

JEE Main 28 July 2022, Shift 1, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

Given below are two statements : Statement I : The average momentum of a molecule in a sample of an ideal gas depends on temperature. Statement II : The rms speed of oxygen molecules in a gas is vv. If the temperature is doubled and the oxygen molecules dissociate into oxygen atoms, the rms speed will become 2v2v. In the light of the above statements, choose the correct answer from the options given below :
  1. (1)Both Statement I and Statement II are true
  2. (2)Both Statement I and Statement II are false
  3. (3)Statement I is true but Statement II is false
  4. (4)Statement I is false but Statement II is trueOfficial answer

Official answer

Option 4

NTA final key (2022 Session 2).

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. 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
  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.