The behaviour of matter in different states is governed by various physical laws. According to you,what are the factors that determine the state of matter?

$A$ sample of air contains $N_2$ and $O_2$ saturated with water vapor,with a total pressure of $640 \ torr$. If the water vapor pressure is $40 \ torr$ and the molar ratio of $N_2$ to $O_2$ is $3 : 1$,what is the partial pressure of $N_2$ in the sample in $torr$?

What is saturated vapor pressure?

If $H_2S$ and $NH_3$ gases are released simultaneously from a cylinder through a small hole,which gas will be detected first and why?

If the rate of diffusion of gas $A$ is five times that of gas $B$,what will be the ratio of the densities of $A$ and $B$?

At constant pressure,the root mean square velocity of an ideal gas is proportional to the density $(d)$ as: