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Why does the vapor pressure of a solution decrease when a...
Why does the vapor pressure of a solution decrease when a non-volatile solute is added to the solvent?
Options
- AThe solute molecules increase vaporization.
- BThe solute molecules reduce surface area.
- CThe solute molecules increase pressure.
- 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.