Q 11-12-026NEETJEE MainMedium
A gas is heated at constant pressure until the rms speed of its molecules doubles. Its volume becomes
Answer: (D) four times
Concept. $v_{\text{rms}} \propto \sqrt{T}$; at constant pressure $V \propto T$.
Step 1. Temperature. Doubling $v_{\text{rms}}$ makes $T$ four times.
Step 2. Volume. Four times.
Answer. Four times (Option D).
Solution by Sreeraj P, M.Sc Physics