For a real gas the `P -V` curve was experimentally plotted and it hed the following appearance. With respect to liquifaction. Choose the correct statement.

Options

A. at `T = 500K, P = 40` atm, the state will be liquid
B. at `T = 300K, P = 50` atm, the state will be gas
C. at `T lt 300K, P gt 20` atm, the state will be gas
D. at `300 K lt T lt 500 K, P gt 50` atm, the state will be liquid.

Answer

D

Explanation

(a) at `T = 500K, P = 40 atm` corresponds to 'a' substance - ga
(b) at `T = 300 K, P = 50 atm` corresponds to 'b' substance -liquid
(c ) at `T lt 300 K, P gt 20 atm` corresponds to 'c' substance -liquid
(d) at `T lt 500 K, P gt 50 atm` corresponds to 'd' substance -liquid
So, Answer (D)