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  1. Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas )

  2. A.

     T

    B.

     √T

    C.

     T²

    D.

     1/√T

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  3. If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

  4. A.

     Volume

    B.

     Enthalpy

    C.

     Both A & B

    D.

     Neither A nor B

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  5. Joule-Thomson co-efficient depends on the

  6. A.

     Pressure

    B.

     Temperature

    C.

     Both A & B

    D.

     Neither A nor B

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  7. In Joule-Thomson porous plug experiment, the

  8. A.

     Enthalpy does not remain constant

    B.

     Entire apparatus is exposed to surroundings

    C.

     Temperature remains constant

    D.

     None of these

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  9. In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when

  10. A.

     N = y = 1.4

    B.

     N = 0

    C.

     N = 1

    D.

     N = 1.66

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  11. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

  12. A.

     Calorific value

    B.

     Heat of reaction

    C.

     Heat of combustion

    D.

     Heat of formation

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  13. Pick out the correct statement:

  14. A.

     In an isothermal system, irreversible work is more than reversible work

    B.

     Under reversible conditions, the adiabatic work is less than isothermal work

    C.

     Heat, work, enthalpy and entropy are all 'state functions'

    D.

     Matter and energy can not be exchanged with the surroundings in a closed system

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  15. For a spontaneous process, free energy

  16. A.

     Is zero

    B.

     Increases

    C.

     Decreases whereas the entropy increases

    D.

     And entropy both decrease

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  17. A large iceberg melts at the base, but not at the top, because of the reason that

  18. A.

     Ice at the base contains impurities which lowers its melting point

    B.

     Due to the high pressure at the base, its melting point reduces

    C.

     The iceberg remains in a warmer condition at the base

    D.

     All of the above

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  19. High __________ is an undesirable property for a good refrigerant.

  20. A.

     Specific heat

    B.

     Latent heat of vaporisation

    C.

     Viscosity

    D.

     Specific vapor volume

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