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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is

  2. A.
    not changed
    B.
    decreasing
    C.
    increasing
    D.
    data sufficient, can't be predicted

  3. An irreversible process

  4. A.
    is the analog of linear frictionless motion in machines.
    B.
    is an idealised visualisation of behaviour of a system.
    C.
    yields the maximum amount of work.
    D.
    yields an amount of work less than that of a reversible process.

  5. The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.

  6. A.
    isobaric
    B.
    isothermal
    C.
    adiabatic
    D.
    none of these

  7. Joule-Thomson co-efficient depends on the

  8. A.
    pressure.
    B.
    temperature.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

  9. Free energy change of mixing two liquid substances is a function of the

  10. A.
    concentration of the constituents only.
    B.
    quantities of the constituents only.
    C.
    temperature only.
    D.
    all (a), (b) and (c).

  11. Pick out the wrong statement.

  12. A.
    System (of partially miscible liquid pairs), in which the mutual solubility increases with rise in temperature, are said to possess an upper consolute temperature.
    B.
    Systems, in which the mutual solubility increases with decrease in temperature, are said to possess lower consolute temperature.
    C.
    Nicotine-water system shows both an upper as well as a lower consolute temperature, implying that they are partially miscible between these two limiting temperatures.
    D.
    none of these

  13. The total change in the enthalpy of a system is independent of the

  14. A.
    number of intermediate chemical reactions involved.
    B.
    pressure and temperature.
    C.
    state of combination and aggregation in the beginning and at the end of the reaction.
    D.
    none of these.

  15. Number of phases in a colloidal system are

  16. A.
    1
    B.
    2
    C.
    3
    D.
    4

  17. Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies that X is

  18. A.
    slower than Y
    B.
    faster than Y
    C.
    three times slower than Y
    D.
    three times faster than Y

  19. Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a __________ vapour.

  20. A.
    superheated
    B.
    desuperheated
    C.
    non-condensable
    D.
    none of these