The unit of pressure is equivalent to which of the following?

Which of the following is zero for an $isochoric$ process?

Arrange the states of matter (solid,liquid,and gas) in increasing order of their thermal energy.

$3.2 \ g$ of oxygen is diffused in $10 \ min$. Under similar conditions,$2.8 \ g$ of nitrogen will diffuse in .............. $min$.

$A$ sample of $O_2$ gas is collected over water at $23\,^oC$ at a barometric pressure of $751\, mm\, Hg$ (vapour pressure of water at $23\,^oC$ is $21\, mm\, Hg$). The partial pressure of $O_2$ gas in the sample collected is

What is the ratio of the rate of diffusion of oxygen $(O_2)$ to hydrogen $(H_2)$?