The correct statement amongst the following is:

Options

A. a)For every gas there exists a characteristic temperature above which it cannot be liquefied no matter however high is the pressure applied called critical temperature of the gas.
B. b)For every gas there exists a characteristic temperature at which its compressibility factor is equal to unity for some range of pressure.
C. c)Amongst He, `N_(2), O_(2)` and `CO_2, CO_2` has the lowest value of "a" and He has the lowest value "b" where a and b are vander walls constants of the gas.
D. d)The extent of departure of Z (compressibility factor) from unity is the measure of the extent of deviation from ideal behavior.

Answer

A, B, D