Correct Answer - A
In a process `PV^(x)=` constant, molar heat capacity is given by `C=(R)/(gamma-1)+(R)/(1-x)`
As the process is `P/V`= constant,
i.e., `PV^(-1)=` constant, therefore, x= -1.
For an ideal monatomic gas, `gamma=5/3`
`thereforeC=(R)/(5/3-1)+(R)/(1-(-1))=3/2+R/2=2R`
`DeltaQ=nC(DeltaT)=1(2R)(2T_(0)-T_(0))=2RT_(0).`