Compressibility factor for almost all the gases are approximately same at the same
A
Pressure and temperature
B
Reduced pressure and reduced temperature
C
Critical pressure and critical temperature
D
None of these
Correct Answer: Reduced pressure and reduced temperature
Since compressibility factor ($$Z$$) is an function of reduced temperature and reduced pressure i..e.., $$Z = fn\left( {{P_r},{T_r}} \right).$$ At same $${P_r}$$ and $${T_r}$$ the compressibility factor remains constant.