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  1. What happens in a reversible adiabatic expansion process?

  2. A.

     Heating takes place

    B.

     Cooling takes place

    C.

     Pressure is constant

    D.

     Temperature is constant

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  3. Which of the following is affected by the temperature?

  4. A.

     Fugacity

    B.

     Activity co-efficient

    C.

     Free energy

    D.

     All of the above

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  5. Which is an example of closed system?

  6. A.

     Air compressor

    B.

     Lquid cooling system of an automobile

    C.

     Boiler

    D.

     None of these

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  7. Entropy of an ideal gas depends upon its

  8. A.

     Pressure

    B.

     Temperature

    C.

     Both A & B

    D.

     Neither A nor B

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  9. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

  10. A.

     μ° + RT ln f

    B.

     μ°+ R lnf

    C.

     μ° + T lnf

    D.

     μ° + R/T lnf

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  11. Partial molal quantities are important in the study of

  12. A.

     Ideal gases

    B.

     Ideal solutions

    C.

     Non-ideal mixtures

    D.

     A pure component

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  13. For organic compounds, group contribution method can be used for the estimation of

  14. A.

     Critical properties

    B.

     Specific gravity

    C.

     Specific volume

    D.

     Thermal conductivity

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  15. The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T₁ and T₂ is given by

  16. A.

     T₁/(T₁-T₂)

    B.

     T₂/(T₁-T₂)

    C.

     T₁/T₂

    D.

     T₂/R1

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  17. Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

  18. A.

     0

    B.

     273

    C.

     25

    D.

     None of these

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  19. At the critical point of a substance

  20. A.

     The surface tension vanishes

    B.

     Liquid and vapour have the same density

    C.

     There is no distinction between liquid and vapour phases

    D.

     All of the above

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