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

Answer: Option B

Solution(By Examveda Team)

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.