alleryNumber of degrees of freedom of a **rigid diatomic molecule** (e.g. O₂ at room temperature, vibrations not excited):
A3
B5 (3 translational + 2 rotational)
C6
D7
Answer & Solution
Correct answer: B. 5 (3 translational + 2 rotational)
**Rigid diatomic:** 3 translational + 2 rotational (about two axes perpendicular to molecular axis; rotation about the axis itself contributes negligibly).
$C_V = (5/2)R$, $C_P = (7/2)R$, $\gamma = 7/5 = 1.4$.
Keep practising Kinetic Theory & Oscillations
Browse all Kinetic Theory & Oscillations questions for Karnataka PUC I, or explore more Physics topics.
Related questions
NEET · Physics · Oscillation Period — Gap FillNEET · Physics · Kinetic Theory — SortA diatomic ideal gas has $C_v = \tfrac{5}{2}R$. Its $C_p$ and ratio $\gamma$ are:If $x_1 = A in(\omega t)$ and $x_2 = A in(\omega t + \pi/3)$, the resultant amplitude of $Two springs of constants $k_1$ and $k_2$ connected in **series** have effective spring conA spring of force constant $k$ is cut into two equal halves. The force constant of each haThe phase difference between displacement $x$ and velocity $v$ in SHM is:A simple pendulum of period $T$ on Earth is taken to the Moon where $g_{moon} = g/6$. Its