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Question: Answered & Verified by Expert
The mean free path for a gas, with molecular diameter d and number density n can be expressed as:
PhysicsKinetic Theory of GasesNEETNEET 2020 (Phase 1)
Options:
  • A 12nπd2
  • B 12n2πd2
  • C 12n2π2d2
  • D 12nπd
Solution:
1017 Upvotes Verified Answer
The correct answer is: 12nπd2

Mean free path for a gas sample

λm=12πd2n

where d is diameter of a gas molecule and n is molecular density

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