Which of the following factor (s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?
(i) nature of solute
(ii) temperature
(iii) pressure

Options

A. All of these
B. (i) only
C. (ii) and (iii) only
D. (iii) only

Answer

To determine which factors affect the solubility of a gaseous solute in a fixed volume of liquid solvent, we will analyze each of the given factors: nature of solute, temperature, and pressure.

### Step-by-Step Solution:

1. **Understanding Solubility**:
- Solubility is defined as the amount of solute that can be dissolved in a given volume of solvent at a specific temperature. For gaseous solutes, this means how much gas can be dissolved in a liquid at a set temperature and pressure.

**Hint**: Remember that solubility is influenced by both the characteristics of the solute and the conditions under which the solution is made.

2. **Nature of Solute**:
- The nature of the solute plays a significant role in solubility. For example, polar gases tend to dissolve better in polar solvents, while non-polar gases are more soluble in non-polar solvents. This is often summarized by the phrase "like dissolves like."

**Hint**: Consider how the polarity of the solute and solvent affects their interaction and solubility.

3. **Temperature**:
- The solubility of gases in liquids is inversely related to temperature. As temperature increases, the kinetic energy of gas molecules also increases, making them more likely to escape from the liquid phase into the gas phase. Therefore, increasing temperature decreases the solubility of gases.

**Hint**: Think about how temperature changes the energy of gas molecules and their tendency to remain dissolved.

4. **Pressure**:
- The solubility of gases in liquids is directly proportional to the pressure of the gas above the liquid. According to Henry's Law, an increase in pressure increases the solubility of a gas. This is because higher pressure forces more gas molecules into the liquid phase.

**Hint**: Recall that pressure affects the concentration of gas molecules in the space above the liquid, influencing how much can dissolve.

5. **Conclusion**:
- All three factors—nature of solute, temperature, and pressure—affect the solubility of a gaseous solute in a fixed volume of liquid solvent. Therefore, the correct answer is that all of these factors affect solubility.

**Final Answer**: The correct option is (i) all of these (1, 2, and 3).