A gas at 350 K and 15 bar has molar volume 20 percent smaller tha

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 Multiple Choice QuestionsMultiple Choice Questions

431.

Positive deviation from ideal behaviour takes place because of

  • molecular interaction between atom and PVnRT>1

  • molecular interaction between atom and PVnRT<1

  • finite size of atoms and PVnRT>1

  • finite size of atoms and PVnRT<1


432.

The vapour pressure will be lowest for :

  • 0.1 M sugar solution

  • 0.1 M KCl solution

  • 0.1 M Cu(NO3)2 solution

  • 0.1 M AgNO3 solution


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433.

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :

  • Z > 1 and repulsive forces are dominant

  • Z < 1 and attractive forces are dominant

  • Z < 1 and repulsive forces are dominant

  • Z > 1 and attractive forces are dominant


B.

Z < 1 and attractive forces are dominant

Compressibility factor(Z) = VrealVideal

Vreal < Videal; Hence Z < 1.

If Z < 1, attractive forces are dominant among gaseous molecules and liquefaction of gas will be easy.


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