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In an adiabatic process, the state of a gas is changed from ${P_1},{V_1},{T_1} $ to ${P_2},{V_2},{T_2}$. Which of the following relation is correct
  • A${T_1}{V_1}^{\gamma - 1} = {T_2}{V_2}^{\gamma - 1}$
  • B${P_1}{V_1}^{\gamma - 1} = {P_2}{V_2}^{\gamma - 1}$
  • C${T_1}{P_1}^\gamma = {T_2}{P_2}^\gamma $
  • D${T_1}{V_1}^\gamma = {T_2}{V_2}^\gamma $
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