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JEE Chemistry · Medium

States of Matter and Gaseous State: Graham's law MCQ

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Graham's lawMediumQuestion 850006

Question

Graham's law of effusion states that the rate of effusion is:
  1. A
    Inversely proportional to √M (rate ∝ 1/√M)
    Correct
  2. B
    Proportional to M
  3. C
    Inversely proportional to M
  4. D
    Proportional to √M

Correct answer

Inversely proportional to √M (rate ∝ 1/√M)

Explanation

Graham's law: r₁/r₂ = √(M₂/M₁). Lighter gases effuse faster. Used to separate isotopes (UF₆) and determine molar masses from effusion rates.

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