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What is the effect of adding a non-volatile solid to a solvent on the freezing point of the solvent, according to Raoult's law?

Options

  1. AThe freezing point of the solvent increases.
  2. BThe freezing point of the solvent decreases.
  3. CThe freezing point of the solvent remains unchanged.
  4. DThe freezing point of the solvent depends on the nature of the solute.

Correct answer

B. The freezing point of the solvent decreases.

Step-by-step solution

According to Raoult's law, when a non-volatile solid is added to the solvent, its vapour pressure decreases, and as a result, the freezing point of the solvent decreases.

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