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  1. The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are

  2. A.

     5 & 3

    B.

     3.987 & 1.987

    C.

     1.987 & 0.66

    D.

     0.66 & 1.987


  3. Gibbs-Duhem equation

  4. A.

     States that n₁dμ₁ + n₂dμ₂ + ....njj = 0, for a system of definite composition at constant temperature and pressure

    B.

     Applies only to binary systems

    C.

     Finds no application in gas-liquid equilibria involved in distillation

    D.

     None of these


  5. Pick out the correct statement.

  6. A.

     The available energy in an isolated system for all irreversible (real) processes decreases

    B.

     The efficiency of a Carnot engine increases, if the sink temperature is decreased

    C.

     The reversible work for compression in non-flow process under isothermal condition is the change in Helmholtz free energy

    D.

     All of the above


  7. The unity of Planck's constant 'h' in the equation, E = hv is

  8. A.

     J/s

    B.

     J.S

    C.

     J/kmol

    D.

     Kmol/J


  9. For the reversible exothermic reaction, N₂ + 3H₂ ⇋ 2NH₃, increase of pressure would

  10. A.

     Shift the equilibrium towards right

    B.

     Give higher yield of NH₃

    C.

     Both B and C

    D.

     Neither A nor B


  11. If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) ⇋ C₃H₈(g) will be __________ Kcal.

  12. A.

     -19.4

    B.

     -30.2

    C.

     55.2

    D.

     -55.2


  13. Pick out the wrong statement.

  14. A.

     A refriferation cycle violates the second law of thermadynamics

    B.

     Refrigeration cycle is normally represented by a temperature vs. entropy plot

    C.

     In a refrigerator, work required decreases as the temperature of the refrigerator and the temperature at which heat is rejected increases

    D.

     One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW


  15. The work done in an adiabatic change in a particular gas depends upon changes in the __________ only.

  16. A.

     Temperature

    B.

     Specific heat

    C.

     Volume

    D.

     Pressure


  17. The expression, nCv(T₂ - T₁), is for the __________ of an ideal gas.

  18. A.

     Work done under adiabatic condition

    B.

     Co-efficient of thermal expansion

    C.

     Compressibility

    D.

     None of these


  19. The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.

  20. A.

     Temperature

    B.

     Pressure

    C.

     Composition

    D.

     All of the above