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  1. The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

  2. A.

     T

    B.

     T and P

    C.

     T, P and Z

    D.

     T and Z

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  3. Which of the following behaves most closely like an ideal gas?

  4. A.

     He

    B.

     N₂

    C.

     O₂

    D.

     H₂

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  5. The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its

  6. A.

     Pressure

    B.

     Volume

    C.

     Temperature

    D.

     All of the above

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  7. Gibbs free energy of mixing at constant pressure and temperature is always

  8. A.

     0

    B.

     ∞

    C.

     + ve

    D.

     - ve

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  9. Heating of water under atmospheric pressure is an __________ process.

  10. A.

     Isochoric

    B.

     Isobaric

    C.

     Adiabatic

    D.

     Isothermal

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  11. Partial molar free energy of an element A in solution is same as its

  12. A.

     Chemical potential

    B.

     Activity

    C.

     Fugacity

    D.

     Activity co-efficient

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  13. The absolute entropy for all crystalline substances at absolute zero temperature is

  14. A.

     Zero

    B.

     Negative

    C.

     More than zero

    D.

     Indeterminate

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  15. Equilibrium constant decreases as the temperature

  16. A.

     Increases, for an exothermic reaction

    B.

     Decreases, for an exothermic reaction

    C.

     Increases, for an endothermic reaction

    D.

     None of these

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  17. A solid is transformed into vapour without going to the liquid phase at

  18. A.

     Triple point

    B.

     Boiling point

    C.

     Below triple point

    D.

     Always

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  19. The number of degrees of freedom at the triple point of water is

  20. A.

     0

    B.

     1

    C.

     2

    D.

     3

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