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  1. The necessary condition for phase equilibrium in a multiphase system of N components is that the

  2. A.

     Chemical potentials of a given component should be equal in all phases

    B.

     Chemical potentials of all components should be same in a particular phase

    C.

     Sum of the chemical potentials of any given component in all the phases should be the same

    D.

     None of these

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  3. It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.

  4. A.

     The amount of work needed is path dependent

    B.

     Work alone can not bring out such a change of state

    C.

     The amount of work needed is independent of path

    D.

     More information is needed to conclude anything about the path dependence or otherwise of the work needed

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  5. Heat of formation of an element in its standard state is

  6. A.

     0

    B.

     < 0

    C.

     > 0

    D.

     A function of pressure

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  7. Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the __________ equation.

  8. A.

     Gibbs-Duhem

    B.

     Maxwell's

    C.

     Clayperon

    D.

     None of these

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  9. For a single component two phase mixture, the number of independent variable properties are

  10. A.

     Two

    B.

     One

    C.

     Zero

    D.

     Three

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  11. For an ideal gas, the internal energy depends upon its __________ only.

  12. A.

     Molecular size

    B.

     Temperature

    C.

     Volume

    D.

     Pressure

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  13. Enthalpy 'H' is defined as

  14. A.

     H = E - PV

    B.

     H = F - TS

    C.

     H - E = PV

    D.

     None of these

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  15. Entropy is a/an

  16. A.

     State function

    B.

     Macroscopic property

    C.

     Extensive property

    D.

     None of these

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  17. Pick out the correct equation relating 'F' and 'A'.

  18. A.

     F = A + PV

    B.

     F = E + A

    C.

     F = A - TS

    D.

     F = A + TS

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  19. Mollier chart is a __________ plot.

  20. A.

     Pressure vs enthalpy

    B.

     Pressure vs volume

    C.

     Enthalpy vs entropy

    D.

     Temperature vs entropy

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