$A$ gas that follows Boyle's law,Charle's law and Avogadro's law is called an ideal gas. Under what conditions does a real gas behave ideally?

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

$A$ gas deviates most from ideal behavior when it is subjected to

Pressure versus volume graph for a real gas and an ideal gas are shown in the figure. Answer the following questions on the basis of this graph:
$(i)$ Interpret the behaviour of real gas with respect to ideal gas at low pressure.
$(ii)$ Interpret the behaviour of real gas with respect to ideal gas at high pressure.
$(iii)$ Mark the pressure and volume by drawing a line at the point where real gas behaves as an ideal gas.

The correct equation for one mole of a real gas is ($a, b$ are constants)

In the van der Waals equation of state for a real gas,the term representing intermolecular forces is .......