KTG & Thermodynamics | JEE Main 2025

JEE MAIN 2025

28-01-2025 SHIFT-2

Question

The ratio of vapour densities of two gases at the same temperature is $\frac{4}{25}$, then the ratio of r.m.s. velocities will be:

Select the correct option:

$\frac{4}{25}$

$\frac{2}{5}$

$\frac{25}{4}$

$\frac{5}{2}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\frac{\rho_{1}}{\rho_{2}}=\frac{4}{25}$
Ratio of rms velocities $=\sqrt{\frac{\rho_{2}}{\rho_{1}}}=\frac{5}{2}$

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JEE Main

Physics

Medium

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