In a flask containing $2 \ g$ of $H_2$ and $32 \ g$ of $SO_2$,the partial pressure of hydrogen is.....

Intermolecular forces and thermal energy decide the physical state of matter. Explain.

Fill in the blanks:
$(1)$ The properties of gases were first measured by ......... .
$(2)$ The dipole-dipole interaction energy between stationary polar molecules is proportional to .......... .
$(3)$ The interaction energy between rotating polar molecules is proportional to .......... .
$(4)$ The bond energy of a hydrogen bond is about ......... $kJ \ mol^{-1}$.

It is recommended that a liquid ammonia bottle should be opened after cooling it in ice for some time. This is because liquid ammonia:

The volume of $1$ mole of any pure gas at standard temperature and pressure $(STP)$ is always equal to (in $m^3$)

Which of the following mixtures of gases does not obey Dalton's law of partial pressure?