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NEET2012ChemistryStates of MatterActual

A certain gas takes three times as long to effuse out as helium. Its molecular mass will be

Options

  1. A27 u
  2. B36 u
  3. C64 u
  4. D9 u

Correct answer

B. 36 u

Step-by-step solution

From Graham's diffusion law, aligned r₁ r₂ & = M₂ M₁ or V₁ t₁ t₂ V₂ & = M₂ M₁ aligned Volume is same, 3 1 = M₂ 4 or 9= M₂ 4 or M₂=9 4=36 u

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