Internal energy of an ideal gas depends on

Fill in the blanks:
$(1)$ The forces of attraction and repulsion between molecules and atoms are called ....... .
$(2)$ The attractive intermolecular forces between molecules of a substance are also known as .............. .
$(3)$ London forces are also known by the name of ........... .
$(4)$ The mathematical form of Charles's Law is ........ .

$A$ gaseous mixture was prepared by taking equal moles of $CO$ and $N_2$. If the total pressure of the mixture was found to be $1 \ atm$,the partial pressure of the nitrogen $(N_2)$ in the mixture is ............ $atm$.

The rate of diffusion of $SO_3$,$CO_2$,$PCl_3$ and $SO_2$ gases are in the following order:

Diffusion of $CH_{4(g)}$ and $O_{2(g)}$ occurs under similar conditions,then the ratio of their rates of diffusion is

What is saturated vapor pressure?