If $N_2$,$O_2$,$H_2$,and $He$ are filled in four separate car tubes at the same pressure,which one will leak out first?

Which of the following statements is correct?

What is the average kinetic energy per molecule of an ideal gas in $SI$ units at $25 \, ^\circ C$?

According to the kinetic molecular theory of gases, which of the following statements are correct?
$a$) The actual volume of the molecules is negligible in comparison to the empty space between them.
$b$) Collisions of gas molecules are inelastic.
$c$) At any particular time, different particles in the gas have the same speed and same kinetic energies.
$d$) Pressure is exerted by the gas as a result of the collision of the particles with the walls of the container.

According to the kinetic molecular theory of gases,which of the following is true?

Assertion : Gases do not settle to the bottom of a container.
Reason : Gases have high kinetic energy.