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For an ideal gas the internal energy is given by `U=5PV//2+C`, where `C` is a constant. The equation of the adiabatic in the `PV` plane will be

A

`P^(5)V^(7)=` constant

B

`P^(7)V^(5)=` constant

C

`P^(3)V^(5)=` constant

D

`P^(5)V^(2)=` constant

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A
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