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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. When pressure is applied on the system, icewater, then

  2. A.
    equilibrium can not be established.
    B.
    more ice will be formed.
    C.
    more water will be formed.
    D.
    evaporation of water will take place.

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

  4. A.
    chemical potential
    B.
    activity
    C.
    fugacity
    D.
    activity co-efficient

  5. Free energy change at equilibrium is

  6. A.
    zero
    B.
    positive
    C.
    negative
    D.
    indeterminate

  7. Heat pump

  8. A.
    accomplishes only space heating in winter.
    B.
    accomplishes only space cooling in summer.
    C.
    accomplishes both (a) and (b).
    D.
    works on Carnot cycle.

  9. The temperature at which both liquid and gas phases are identical, is called the __________ point.

  10. A.
    critical
    B.
    triple
    C.
    freezing
    D.
    boiling

  11. What is the value of ln y (where y = activity co-efficient) for ideal gases ?

  12. A.
    Zero
    B.
    Unity
    C.
    Infinity
    D.
    Negative

  13. A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

  14. A.
    its internal energy (U) decreases and its entropy (S) increases.
    B.
    U and S both decreases
    C.
    U decreases but S is constant.
    D.
    U is constant but S decreases.

  15. Which is not a refrigerant ?

  16. A.
    SO2
    B.
    NH3
    C.
    CCl2F2
    D.
    C2H4Cl2

  17. The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

  18. A.
    less than
    B.
    equal to
    C.
    more than
    D.
    either (b) or (c); depends on the type of alloy

  19. Heat is added at constant pressure in an ideal __________ cycle.

  20. A.
    Stirling
    B.
    Brayton
    C.
    Rankine
    D.
    both (b) and (c)