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Why does the vapor pressure of a solution decrease when a non-volatile solute is added to the solvent?

Options

  1. AThe solute molecules increase vaporization.
  2. BThe solute molecules reduce surface area.
  3. CThe solute molecules increase pressure.
  4. DThe solute molecules enhance the solute's volatility.

Correct answer

B. The solute molecules reduce surface area.

Step-by-step solution

The paragraph indicates that in a solution, the presence of solute molecules reduces the fraction of the surface area covered by solvent molecules, leading to a decrease in vapor pressure.

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