Identify the $FALSE$ statement about ideal solutions from the following.

  • A
    Ideal solutions obey Raoult's law over the entire range of concentration.
  • B
    No heat is evolved or absorbed when two components forming an ideal solution are mixed.
  • C
    The volume of an ideal solution is the same as the sum of the volumes of the two components taken for mixing.
  • D
    The vapour pressure of an ideal solution is either higher or lower than the vapour pressure of the pure components.

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At $T \ K$,two liquids $A$ and $B$ form an ideal solution. The vapour pressures of pure liquids $A$ and $B$ at that temperature are $400 \ mm \ Hg$ and $600 \ mm \ Hg$ respectively. If the mole fraction of liquid $B$ is $0.3$ in the mixture,the mole fractions of $A$ and $B$ in the vapour phase respectively are

Which property is not found in an ideal solution?

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