$A$ gas deviates from ideal behaviour at a high pressure because its molecules

Consider the equation $Z = \frac{PV}{RT}.$ Which of the following statements is correct?

The term that accounts for intermolecular force in Van der Waals equation for non-ideal gas is

At low pressure,the Van der Waals equation is reduced to:

What is the pressure of $2 \, mol$ of $NH_3$ at $27 \, ^oC$ when its volume is $5 \, L$ using the van der Waals equation (in $, atm$)? ($a = 4.17 \, L^2 \, bar \, mol^{-2}$,$b = 0.03711 \, L \, mol^{-1}$)

The van der Waals constants for $HCl$ gas are $a = 3.6 \ atm \ L^2 \ mol^{-2}$ and $b = 40 \ mL \ mol^{-1}$. The critical temperature of the gas is : ............. $K$ [ $R = 0.08 \ atm \ L \ K^{-1} \ mol^{-1}$ ]