Answer: lower solubility.
- A higher solubility
- B lower solubility
- C zero solubility
- D greater volatility only
Correct answer: B. lower solubility
Explanation: Since x = p/K<sub>H</sub>, a larger K<sub>H</sub> gives a smaller mole fraction in solution, i.e. lower solubility of the gas.
Adding a non-volatile solute lowers the solvent's vapour pressure at every temperature, which is the root cause behind all four colligative properties: it shifts the freezing point down and the boiling point up.
Concept context
Learn how substances dissolve and form mixtures. Covers concentration terms, colligative properties (boiling point elevation, freezing point depression, osmotic pressure), and ideal vs non-ideal solution behaviour.