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  1. Entropy change of mixing two liquid substances depends upon the

  2. A.
    molar concentration
    B.
    quantity (i.e. number of moles)
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

  3. The four properties of a system viz. P, V, T, S are related by __________ equation.

  4. A.
    Gibbs-Duhem
    B.
    Gibbs-Helmholtz
    C.
    Maxwell's
    D.
    none of these

  5. If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________ c.c.

  6. A.
    100
    B.
    50
    C.
    205
    D.
    200

  7. Pick out the wrong statement.

  8. A.
    Cp of monoatomic gases such as metallic vapor is about 5 kcal/kg.atom.
    B.
    The heat capacity of solid inorganic substance is exactly equal to the heat capacity of the substance in the molten state.
    C.
    There is an increase in entropy, when a spontaneous change occurs in an isolated system.
    D.
    At absolute zero temperature, the heat capacity for many pure crystalline substances is zero.

  9. The principle applied in liquefaction of gases is

  10. A.
    adiabatic expansion.
    B.
    Joule-Thomson effect.
    C.
    both (a) and (b).
    D.
    neither (a) nor (b).

  11. Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is


  12. The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are

  13. A.
    zero
    B.
    one
    C.
    two
    D.
    three

  14. Any substance above its critical temperature exists as

  15. A.
    saturated vapour
    B.
    solid
    C.
    gas
    D.
    liquid

  16. Which of the following decreases with increase in pressure ?

  17. A.
    Melting point of ice
    B.
    Melting point of wax
    C.
    Boiling point of liquids
    D.
    none of these

  18. Isentropic process means a constant __________ process.

  19. A.
    enthalpy
    B.
    pressure
    C.
    entropy .
    D.
    none of these