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JEE Main20199 Apr 2019Morning ShiftPhysicsKinetic Theory of GasesActual

For given gas at 1 a t m pressure, r m s speed of the molecules is 200 m / s at 127 ° C . At 2 a t m pressure and at 227 ° C , the r m s speed of the molecules will be:

Options

  1. A100 m / s
  2. B80 m / s
  3. C80 5 m / s
  4. D100 5 m / s

Correct answer

D. 100 5 m / s

Step-by-step solution

V r m s = 3 R T M ⇒ V r m s ∝ T V 1 V 2 = T 1 T 2 200 V 2 = 400 500 V 2 = 100 5 m / s

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