Which effect is observed when the pressure of a gas increases?

If $500 \ mL$ of gas $A$ at $1000 \ torr$ and $1000 \ mL$ of gas $B$ at $800 \ torr$ are taken in a $2 \ L$ container,the final pressure is .......... $torr$.

The density of $O_{2(g)}$ is maximum at?

At constant temperature,a gas is at a pressure of $940.3 \, mm \, Hg$. The pressure at which its volume decreases by $40 \%$ is $......... \, mm \, Hg$. (Nearest Integer)

Calculate the temperature of $2 \text{ moles}$ of gas occupying a volume of $5.0 \text{ L}$ at a pressure of $24.6 \text{ atm}$. (Given: $R = 0.0821 \text{ L atm K}^{-1} \text{ mol}^{-1}$) (in $^\circ \text{C}$)

Which relation represents the change in density of an ideal gas with changes in temperature and pressure?