Q181
General ScienceChemistry
A non-volatile solid is added to water. Its boiling point will
- a.decrease.
- b.increase.
- c.not change.
- d.not to be predicted.
Answer: (B) increase.
A non-volatile solute lowers the vapour pressure of water, so a higher temperature is needed to reach atmospheric pressure, raising the boiling point (elevation of boiling point, a colligative property). This is why salted water boils slightly above 100 °C.