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What condition must be met for a solution to freeze?

Options

  1. AIts vapour pressure must be higher than the vapour pressure of the pure solid solvent.
  2. BIts vapour pressure must be lower than the vapour pressure of the pure solid solvent.
  3. CIts vapour pressure must be equal to the vapour pressure of the pure solid solvent.
  4. DIts vapour pressure must be higher than the atmospheric pressure.

Correct answer

C. Its vapour pressure must be equal to the vapour pressure of the pure solid solvent.

Step-by-step solution

A solution will freeze when its vapour pressure equals the vapour pressure of the pure solid solvent.

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