AMU Engineering 2018 solved paper Solved Paper

In the question, the given curves represents the behaviour of gases at different temperatures.
where, (i) T2>T3>T4
(ii) ∵ For ideal gas,

pV

nRT

=1, hence curve I represent the ideal gas behaviour of the gas.
(iii) The curves II, III and IV represent the behaviour of real gases.
Thus, option (b) is correct.