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MHT CET202124 Sep 2021Evening ShiftPhysicsKinetic Theory of GasesActual

The molecular masses of helium and oxygen are 4 and 32 respectively. The ratio of r.m.s speed of helium at 327^ C to r.m.s speed of oxygen at 27^ C will be

Options

  1. A1:6
  2. B8:1
  3. C1:8
  4. D4:1

Correct answer

D. 4:1

Step-by-step solution

aligned & R.M.S speed is given by, c = 3 RT M & T _ He =327^ C =600 ~K , ~T _ o =27^ C =300 ~K & C _ He C _ O = T _ He T _ O M _ O M _ He = 600 300 32 4 =4 aligned

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