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  1. Isobaric process means a constant process.

  2. A.
    temperature
    B.
    pressure
    C.
    volume
    D.
    entropy

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  3. No work is done by the system, when a reaction occurs at constant

  4. A.
    volume
    B.
    temperature
    C.
    pressure
    D.
    none of these

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  5. If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

  6. A.
    Maxwell's equation
    B.
    Clayperon-Claussius equation
    C.
    Van Laar equation
    D.
    Nernst Heat Theorem

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  7. The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

  8. A.
    contracts
    B.
    expands
    C.
    does not change in volume
    D.
    either (a), (b) or (c)

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  9. "At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero". This follows from the

  10. A.
    third law of thermodynamics
    B.
    second law of thermodynamics
    C.
    Nernst heat theorem
    D.
    Maxwell's relations

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  11. During Joule-Thomson expansion of gases

  12. A.
    enthalpy remains constant.
    B.
    entropy remains constant.
    C.
    temperature remains constant.
    D.
    none of these.

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  13. The accentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always

  14. A.
    > 2
    B.
    < 1
    C.
    > 1
    D.
    < 3

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  15. "Law of corresponding states" says that

  16. A.
    , two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same.
    B.
    the surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature.
    C.
    no gas can be liquified above the critical temperature, howsoever high the pressure may be.
    D.
    the molar heat of energy of gas at constant volume should be nearly constant (about 3 calories).

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  17. Linde gas liquefaction process employs cooling

  18. A.
    by throttling
    B.
    by expansion in an engine
    C.
    at constant pressure
    D.
    none of these

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  19. Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2.Degree of dissociation of PCl5 will

  20. A.
    decrease on addition of Cl2.
    B.
    increase on addition of an inert gas at constant pressure.
    C.
    decrease on increasing the pressure of the system.
    D.
    none of these

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