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JEE Main202528 Jan 2025Evening ShiftPhysicsKinetic Theory of GasesActual

The ratio of vapour densities of two gases at the same temperature is 4 25 , then the ratio of r.m.s. velocities will be:

Options

  1. A25 4
  2. B2 5
  3. C5 2
  4. D4 25

Correct answer

C. 5 2

Step-by-step solution

(Vapor density) = ( Molar mass 2 ) , I.e, v d= M 2 aligned & v_ rms = 3 R T M & v₂ v₁ = M₁ M₂ = 25 4 = 5 2 aligned

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