In general, as the temperature increases, the solubility of gas in a given liquid ________________, and the solubility of most solids in a given liquid ________________. 
a. Increases, increases
b. increases, decreases
c. decreases, increases
d. decreases, decreases

• A. C
• B. B
• C. A
• D. D

Answer: (A)

Verified step by step guidance

1. Understand the relationship between temperature and solubility for gases: As temperature increases, the kinetic energy of gas molecules increases, causing them to escape from the liquid more easily, thus decreasing solubility.
2. Understand the relationship between temperature and solubility for solids: As temperature increases, the kinetic energy of solid particles increases, allowing them to dissolve more readily in the liquid, thus increasing solubility.
3. Identify the correct pattern for solubility changes with temperature: For gases, solubility decreases with increasing temperature; for most solids, solubility increases with increasing temperature.
4. Match the observed patterns to the given options: The correct option should reflect the decrease in solubility for gases and increase for solids as temperature rises.
5. Select the correct answer based on the analysis: The correct choice is option C, which states that the solubility of gas decreases and the solubility of most solids increases with temperature.