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JEE Main202125 Feb 2021Evening ShiftPhysicsKinetic Theory of GasesActual

Given below are two statements: Statement I: In a diatomic molecule, the rotational energy at a given temperature obeys Maxwell's distribution. Statement II : In a diatomic molecule, the rotational energy at a given temperature equals the translational kinetic energy for each molecule. In the light of the above statements, choose the correct answer from the options given below:

Options

  1. AStatement I is false but Statement II is true.
  2. BStatement I is true but Statement II is false.
  3. CBoth Statement I and Statement II are true.
  4. DBoth Statement I and Statement II are false.

Correct answer

B. Statement I is true but Statement II is false.

Step-by-step solution

The translational kinetic energy & rotational kinetic energy both obey Maxwell's distribution independent of each other. Translational kinetic energy of diatomic molecules = 3 2 kT Rotational kinetic energy of diatomic molecules = 2 2 kT So statement I is true but statement II is false.

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