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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 72 of 200

Q72
General SciencePhysics
The degrees of freedom of H$_2$ molecule is
  1. a.2
  2. b.3
  3. c.5
  4. d.6

Answer: (C) 5

A diatomic molecule like H$_2$ has 3 translational and 2 rotational degrees of freedom at ordinary temperatures, totalling 5. Three applies to a monatomic gas, and 6 would count rotation about the bond axis or vibration, which are not active.

Q71 Whole paperQ73