The root mean square velocity of a gas molecule of mass $m$ at a given temperature is proportional to

Equal volumes of two gases are kept in different containers having densities in the ratio $1:16$. They exert equal pressures on the walls of their respective containers. Then the ratio of their r.m.s. velocities is

When the temperature of a gas is raised from $27^{\circ} C$ to $90^{\circ} C$,the increase in the rms velocity of the gas molecules is: (in $\%$)

The $r.m.s.$ velocity will be greater for

The $rms$ speed of hydrogen molecules at room temperature $(300 \ K)$ will be:

At what temperature will the oxygen molecules have the same root mean square speed as hydrogen molecules at $200 \, K$ (in $, K$)?