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Question 30957
JEE Physics · Hard

Fluid Mechanics: Viscosity MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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ViscosityHardQuestion 30957

Question

Viscosity of a gas arises from:
  1. A
    Molecular attraction
  2. B
    Momentum transfer between layers via molecular collisions
    Correct
  3. C
    Surface energy
  4. D
    Pressure differences

Correct answer

Momentum transfer between layers via molecular collisions

Explanation

In gases, faster layers exchange momentum with slower layers via molecular collisions, creating viscous drag.

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