Moderate

Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the________________?

Correct answer: E. All A., B. & C.

  • A. Sizes of the component molecules are approximately equal
  • B. Attractive forces between like and unlike molecules are approximately equal
  • C. Component molecules are non-polar and no chemical combination or molecular association
  • D. between unlike molecules takes place in the formation of the solution
  • E. All A., B. & C.

Explanation

Raoult's law describes an ideal solution, in which like and unlike molecular attractions are nearly equal and the components have similar molecular behaviour. The listed conditions A, B and C collectively represent the assumptions behind this idealisation.

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