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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceOtherMediumConceptual

JEE Main 27 June 2022, Shift 2, Physics Q38

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

According to kinetic theory of gases, A. The motion of the gas molecules freezes at 0°C. B. The mean free path of gas molecules decreases if the density of molecules is increased. C. The mean free path of gas molecules increases if temperature is increased keeping pressure constant. D. Average kinetic energy per molecule per degree of freedom is 32kBT\frac{3}{2}k_BT (for monoatomic gases). Choose the most appropriate answer from the options given below:
  1. (1)A and C only
  2. (2)B and C onlyOfficial answer
  3. (3)A and B only
  4. (4)C and D only

Official answer

Option 2

NTA final key.

Chapter
Kinetic Theory
Topic
Kinetic Theory of Gases
Idea tested
Mean Free Path

Same idea in other shifts

Asked 6× in all
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  2. 8 Apr 2024, Shift 2 · Q39Given below are two statements : Statement (I) : The mean free path of gas molecules is inversely proportional to square of molecular…EasyTwo statements
  3. 25 Jul 2021, Shift 2 · Q23A system consists of two types of gas molecules A and B having same number density 2×10252\times10^{25}/m3^3. The diameter of A and B are 10…EasyNumerical value
  4. 16 Mar 2021, Shift 2 · Q7Calculate the value of mean free path (λ\lambda) for oxygen molecules at temperature 27∘C27^\circ\mathrm{C} and pressure 1.01×1051.01\times10^5…EasySingle correct
  5. 2 Sep 2020, Shift 2 · Q9An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true ? (A) the…MediumOther

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.