P-V diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of the gas in the process will be

Explanation

P-V diagram of the gas is a straight line passing through origin. Hence,
`PpropV` or `PV^(-1)=` constant `rArrx=-1`
`C=(R)/(.-1)+(R)/(1-x)` Here, `gamma=1.4` (for diatomic gas)
`therefore C=(R)/(1.4-1)+(R)/(1+1)` or `C=R`