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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

  2. A.

     Increases

    B.

     Decreases

    C.

     Remains same

    D.

     Decreases linearly


  3. In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.

  4. A.

     0.25

    B.

     0.5

    C.

     0.75

    D.

     1


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

  6. A.

     Critical

    B.

     Triple

    C.

     Freezing

    D.

     Boiling


  7. The variation of heat of reaction with temperature at constant pressure is given by the __________ law.

  8. A.

     Kelvin's

    B.

     Antonie's

    C.

     Kirchoffs

    D.

     None of these


  9. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

  10. A.

     Decreases

    B.

     Increases

    C.

     Remains same

    D.

     Decreases linearly


  11. Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.

  12. A.

     Decreases

    B.

     Decreases exponentially

    C.

     Increases

    D.

     Remains constant


  13. When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs. This phenomenon is related to the

  14. A.

     Gibbs-Duhem equation

    B.

     Gibbs-Helmholtz equation

    C.

     Third law of thermodynamics

    D.

     Joule-Thomson effect


  15. Fugacity co-efficient of a substance is the ratio of its fugacity to

  16. A.

     Mole fraction

    B.

     Activity

    C.

     Pressure

    D.

     Activity co-efficient


  17. Out of the following refrigeration cycles, which one has maximum COP?

  18. A.

     Air cycle

    B.

     Carnot cycle

    C.

     Ordinary vapor compression cycle

    D.

     Vapor compression with a reversible expansion engine


  19. The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be

  20. A.

     More

    B.

     Less

    C.

     Same

    D.

     Data insufficient to predict