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20. Two samples A and B of a gas initially at the same pressure and temperature are compressed from volume V to V/2 (A isothermally and adiabatically). The final pressure of A is

(a)  Greater than the final pressure of B

(b)  Equal to the final pressure of B

(c)   Less than the final pressure of B

(d)  Twice the final pressure of B

Answer-c

(9)

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