Hydrogen gas diffuses six times faster than gas $A$. The molar mass of gas $A$ is

The rate of diffusion of a gas is ..... times that of hydrogen. (Molecular weight = $98$)

The rate of diffusion of a gas is inversely proportional to

For the diffusion of a gas at pressure $P$,the rate of diffusion is expressed by :

Gaseous state is characterised by which of the following physical properties?
$I$. Gases mix evenly and completely in all proportions without any mechanical aid.
$II$. Gases exert pressure in all directions evenly.
$III$. Gases are highly compressible and have lower density than liquids and solids.
$IV$. The volume and shape of the gas is fixed.

$A$ container consists of a mixture of $28 \ g \ N_2$,$8 \ g \ He$,and $40 \ g \ Ne$ at $25^{\circ} C$. If the total pressure exerted by the gaseous mixture is $20 \ bar$,what is the partial pressure exerted by $N_2$ (in $bar$)?