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__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

A. Entropy

B. Gibbs free energy

C. Internal energy

D. All (A), (B) & (C)

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  3. Which of the following is not an equation of state?
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  5. Which of the following is not an intensive property?
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  7. Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.
  8. The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by
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  11. The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for
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  13. The necessary and sufficient condition for equilibrium between two phases is
  14. Degrees of freedom at triple point will be
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  21. If the internal energy of an ideal gas decreases by the same amount as the work done by the system,…
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  24. COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about
  25. An isentropic process is carried out at constant
  26. Ideal gas law is applicable at
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