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    2.

    KEKE of one mole of He at 0\,^\circ C is:

    A

    819.0cal819.0\,\,{\rm{cal}}

    B

    84.43cal84.43\,\,{\rm{cal}}

    C

    8.143.0cal8.143.0\,\,{\rm{cal}}

    D

    None of these

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    3.

    Which Statement about evaporation is incorrect ?

    A

    Evaporation takes place at all temperature

    B

    Evarporation occurs only at the surface

    C

    Evarporation produces cooling

    D

    Average KE of residual liquid molecules increases as evaporation occurs

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    6.

    Which of the following assumptions of the kinetic theory of gases is NOT true for real gases?

    A

    Gas particles are in constant, random motion.

    B

    Gas particles exert no attractive or repulsive forces on each other.

    C

    The average kinetic energy of gas particles is proportional to the absolute temperature.

    D

    Collisions between gas particles are perfectly elastic.

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