In a diatomic molecule, the rotational energy at a given temperature:
(a) obeys Maxwell’s distribution.
(b) have the same value for all molecules.
(c) equals the translational kinetic energy for each molecule.
(d) is \(\frac{2}{3}\text{rd}\) the translational kinetic energy for each molecule.
Choose the correct alternatives:
1. (a), (b) 2. (a), (d)
3. (c), (d) 4. (a), (c)
Subtopic:  Law of Equipartition of Energy |
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NEET 2026 - Target Batch - Vital
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Diatomic molecules like hydrogen have energies due to both translational as well as rotational motion. The equation in kinetic theory \(p V=\frac{2}{3} E \text {, }\) \(E\) is:
1. the total energy per unit volume.
2. only the translational part of energy because rotational energy is very small compared to translational energy.
3. only the translational part of the energy because during collisions with the wall pressure relates to the change in linear momentum.
4. the translational part of the energy because rotational energies of molecules can be of either sign and its average over all the molecules is zero
Subtopic:  Law of Equipartition of Energy |
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