Maximum deviation from ideal gas is expected from:
A. ${{H}_{2}}(g)$
B. ${{N}_{2}}(g)$
C. $C{{H}_{4}}(g)$
D. $N{{H}_{3}}(g)$

Hint: The ideal gas law is the equation of a state of a hypothetical ideal gas. An ideal gas is not real just it is a theoretical gas which is made up of a set of randomly moving point particles which interact with each other only through elastic collisions.

Complete Solution :
- In thermodynamics Ideal gas law is defined as an approximation of the behavior of many gases which proceed in diverse conditions. Ideal Gas Equation is generally defined as the combination of empirical laws like Charle’s law, Boyle’s law, Gay-Lussac’s law and Avogadro’s law.
- Ideal Gas Equation can also be defined in some other i.e. it is the equation which defines the states of the hypothetical gases which are expressed mathematically by the combinations of empirical and physical constants. It is also known by the name of the general gas equation.
- The deviation from the ideal gas depends on the pressure and temperature and the state of an ideal gas is determined by the macroscopic and microscopic parameters like pressure, volume, temperature.
- Out of all the options $N{{H}_{3}}(g)$ is most readily liquefiable gas and it has the strongest intermolecular attraction forces due to which it shows maximum deviation from ideal gas.
So, the correct answer is “Option D”.

Note: The ideal gas equation can be defined as:
$PV = nRT$
Where P is the pressure of the ideal gas, V is the volume of the ideal gas, n is the amount of ideal gas measured in terms of moles, R is the gas constant and T is the temperature.