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  1. For equilibrium process (i.e. reversible) in an isolated system

  2. A.
    ds = 0
    B.
    ds < 0
    C.
    ds > 0
    D.
    ds = Constant

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  3. 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

  4. A.
    T
    B.
    T and P
    C.
    T, P and Z
    D.
    T and Z

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  5. With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

  6. A.
    increases
    B.
    decreases
    C.
    remains same
    D.
    decreases linearly

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  7. For an ideal gas, the enthalpy

  8. A.
    increases with rise in pressure.
    B.
    decreases with rise in pressure.
    C.
    is independent of pressure.
    D.
    is a path function.

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  9. Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

  10. A.
    two temperatures only.
    B.
    pressure of working fluid.
    C.
    mass of the working fluid.
    D.
    mass and pressure both of the working fluid.

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  11. In Joule-Thomson porous plug experiment, the

  12. A.
    enthalpy does not remain constant.
    B.
    entire apparatus is exposed to surroundings.
    C.
    temperature remains constant.
    D.
    none of these.

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  13. The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzman's constant, T = absolute temperature)

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  15. The intensive properties are

  16. A.
    molar volume, density, viscosity and boiling point.
    B.
    refractive index and surface tension.
    C.
    both (a) and (b).
    D.
    none of these.

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  17. A Carnot cycle consists of the following steps :

  18. A.
    Two isothermals and two isentropics.
    B.
    Two isobarics and two isothermals.
    C.
    Two isochorics and two isobarics.
    D.
    Two isothermals and two isochorics.

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  19. For a cyclic process, a fixed ratio between heat and work

  20. A.
    always exists
    B.
    may exist
    C.
    never exists
    D.
    is difficult to predict

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