Real Gas

Consider the following statements :

I. Density and molar mass of gaseous substance are related as $\mathrm{M}=\frac{\mathrm{dRT}}{\mathrm{p}}$

II. Partial pressure in terms of molefraction is related as ${\mathrm{p}}_{\mathrm{i}}={\mathrm{\chi }}_{\mathrm{i}} {\mathrm{p}}_{\mathrm{total}}$

III. At constant temperature, $\mathrm{pV} \mathrm{vs} \mathrm{p}$ plot for real gases is a straight line 

IV. Real gases do not follow ideal gas equation perfectly under all conditions

Choose the correct statements and select the correct option

Gases deviate from ideal behaviour at high pressures because the gas molecules

The internal energy per mole of an ideal gas is denoted by ${\mathrm{E}}_{\mathrm{ideal}}$. The same for a real gas obeying van der Waals equation is ${\mathrm{E}}_{\mathrm{real}}$. Assuming the average kinetic energy of the molecules of the two gases at the same temperature to be equal, the correct statement for the gas at low pressure is

A real gas tends to behave as an ideal gas at

Which of the following is correct?

Identify the postulate of kinetic molecular theory of gases which does not hold good under all conditions.

Identify the postulate of kinetic molecular theory of gases which does not hold good under all conditions.

A real gas would be most likely to obey the ideal gas laws at

A gas deviates most from ideal behaviour when it is subjected to ________

Among the following, the incorrect statement is:

The pressure $\left(\mathrm{p}\right)$ and volume $\left(\mathrm{V}\right)$ isotherm of a van der Waals' gas, at the temperature at which it undergoes gas to liquid transition, is correctly represented by

Under which of the following conditions does a gas deviate the most from ideal behaviour?

Which of the following gas shows only positive deviation from ideal behavior:

When does a real gas show behaviour same as ideal gas:

Real gases approach ideal behaviour at:

The unit of the van der Waal's constant $\text{'}a\text{'}$ is:

A real gas most closely approaches the behaviour of an ideal gas at:

Which of the following statement is false:

The units of the van der Waal's constant 'a' are