On a Z-p compressibility factor chart as p approaches zero, at the Boyle temperature the slope of the isotherm is

On a Z-p compressibility factor chart as p approaches zero, at the Boy

1.	On a Z-p compressibility factor chart as p approaches zero, at the Boyle temperature the slope of the isotherm is
A.	zero
B.	unity
C.	negative
D.	positive
Answer» B. unity