TS EAMCET 5-Aug-2021 Shift 2 Question Paper

Helium gas is shown in following curve.Looking at the graph, it is seen that at constant temperature the pVvsp plot is not a straight line for real gases. There is significant deviation from the ideal behaviour.
In the case of hydrogen and helium, if the value of p increases then pV also increases. In other cases, for example methane and carbon dioxide, initially there is a negative deviation from the ideal behaviour, the increase in pressure decreases the value of pV and reaches a minimum value. After it reaches the minimum point, pV value starts increasing and crosses the line for the ideal gas and then shows positive deviation continuously.
So, it can be said that the real gases do not follow the ideal gas equation at all temperature and pressure.