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How does the presence of a non-volatile solute in a solvent affect the vapor pressure of the solution at a given temperature?

Options

  1. AIt increases the vapor pressure.
  2. BIt has no effect on the vapor pressure.
  3. CIt decreases the vapor pressure.
  4. DIt depends on the nature of the solute.

Correct answer

C. It decreases the vapor pressure.

Step-by-step solution

The paragraph explains that when a non-volatile solute is added to a solvent, the vapor pressure of the resulting solution is lower than the vapor pressure of the pure solvent at the same temperature.

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