On the `P-T` graph of an ideal gas, choose the correct option(s):

Options

A. Adiabatic process will be a straight line.
B. Isochoric process will be straight line passing through the origin.
C. adiabatic curve will have a positive slope.
D. the slope of adiabatic curve is proportional T.

Answer

B, C

Explanation

`P^(1-r)T^(gamma)=` constant
`PpropT^((gamma)/(gamma-1))`
Slope `(dP)/(dT)prop(gamma)/(gamma-1).T^((1)/(gamma-1))gt0`
`(d^(2)P)/(dT^(2))gt0`.