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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is

  2. A.

     Infinity

    B.

     Unity

    C.

     Constant

    D.

     Negative


  3. Pick out the wrong statement.

  4. A.

     The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction

    B.

     With increase in temperature, the equilibrium constant increases for an exothermic reaction

    C.

     The equilibrium constant of a reaction depends upon temperature only

    D.

     The conversion for a gas phase reaction increases with increase in pressure, if there is a decrease in volume accompanying the reaction


  5. Internal energy is equal to the heat absorbed in case of a/an __________ process.

  6. A.

     Constant volume

    B.

     Polytropic

    C.

     Adiabatic

    D.

     Constant pressure


  7. __________ increases with increase in pressure.

  8. A.

     The melting point of wax

    B.

     The boiling point of a liquid

    C.

     Both A and B

    D.

     Neither A nor B


  9. A Carnot cycle consists of the following steps :

  10. A.

     Two isothermals and two isentropics

    B.

     Two isobarics and two isothermals

    C.

     Two isochorics and two isobarics

    D.

     Two isothermals and two isochorics


  11. Throttling process is a/an __________ process.

  12. A.

     Reversible and isothermal

    B.

     Irreversible and constant enthalpy

    C.

     Reversible and constant entropy

    D.

     Reversible and constant enthalpy


  13. The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

  14. A.

     Internal energy

    B.

     Enthalpy

    C.

     Gibbs free energy

    D.

     Helmholtz free energy


  15. As the time is passing, entropy of the universe

  16. A.

     Is increasing

    B.

     Is decreasing

    C.

     Remains constant

    D.

     Data insufficient, can't be predicted


  17. The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

  18. A.

     Less pronounced

    B.

     More pronounced

    C.

     Equal

    D.

     Data insufficient, can't be predicted


  19. "The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is

  20. A.

     The statement as per Gibbs-Helmholtz

    B.

     Called Lewis-Randall rule

    C.

     Henry's law

    D.

     None of these