Solubility of a gas in liquid increases on

Options

A. Addition of a catalyst
B. Decreaseing of pressure
C. Increasing of pressure
D. Increasing of temperature

Answer

To solve the question regarding the solubility of a gas in a liquid, we can analyze the factors that influence this solubility.

### Step-by-Step Solution:

1. **Understanding Solubility**:
- Solubility refers to the ability of a substance (in this case, a gas) to dissolve in a solvent (in this case, a liquid).

2. **Effect of Temperature**:
- The solubility of gases in liquids is affected by temperature. As the temperature decreases, the solubility of gases in liquids increases. This is because lower temperatures reduce the kinetic energy of gas molecules, allowing more gas to be dissolved in the liquid.
- Conversely, increasing the temperature leads to an increase in the kinetic energy of the gas molecules, which makes them escape from the liquid more readily, thus decreasing solubility.

3. **Effect of Pressure**:
- The solubility of gases in liquids is also influenced by pressure. According to Henry's Law, an increase in pressure above the liquid increases the solubility of the gas in that liquid. This is because higher pressure forces more gas molecules into the liquid phase.
- Therefore, increasing the pressure favors the dissolution of gas in the liquid.

4. **Conclusion**:
- From the analysis, we can conclude that the solubility of a gas in a liquid increases when the temperature decreases and when the pressure increases.

### Final Answer:
The solubility of a gas in a liquid increases on decreasing temperature and increasing pressure.

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