Consider the following statements:
(a) At high pressure all real gases have `Z gt 1` while at moderate pressure most gases have `Z lt 1`
(b) Vanderwaal constant 'a' is measure of attractive force within the gas and is independent of temperature and pressure.
(c) Greater the critical temperature of a gas more easily it will be liquified.
(d) There is no force of attraction between molecules of ideal gas. The correct statements are: -

Options

A. Ony b,c,d
B. Only a,c,d
C. Only c,d
D. All a,b,c,d

Answer

D