The rms speed of oxygen is v at a particular temperature. If the

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

91.

At what temperature will the rms speed of air molecules be double that NTP ?

  • 519° C

  • 619° C

  • 719° C

  • 819° C


92.

The equation of state for n moles of an ideal gas is pV = nRT, where R is a constant. The SI unit for R is

  • Jk-1 per molecule

  • JK-1 mol-1

  • JKg-1K-1

  • Jk-1g-1


93.

One mole of an ideal monoatomic gas is heated at a constant pressure from 0°C to 100°C. Then the change in the internal energy of the gas is (Given, R = 8.32 J mol-1 K-1)

  • 0.83 × 103 J

  • 4.6 × 103 J

  • 2.08 × 103 J

  • 1.25 × 103 J


Advertisement

94.

The rms speed of oxygen is v at a particular temperature. If the temperature is doubled and oxygen molecules dissociate into oxygen atoms, the rms speed becomes

  • v

  • 2 v

  • 2 v

  • 4 v


C.

2 v

As the rms speed is given by

    vrms = 3RTM   vrms  TM

When temperature is doubled and molecules dissociates into atoms, then

    vrms 1vrms2 = TM2TM/2 = TM4TM = T4T = 12

If vrms1 is v, then vrms2 will be 2v.


Advertisement
Advertisement
Advertisement