Aqueous tension is the vapour pressure of ........ And depends only upon .........

Explanation

**Step-by-Step Solution:**

1. **Understanding Aqueous Tension**: Aqueous tension refers to the vapor pressure of water in a system. It is specifically the pressure exerted by the saturated water vapor present in a moist gas.

2. **Defining Aqueous Tension**: Aqueous tension can be defined as the vapor pressure of water, which is the pressure exerted by the water vapor in equilibrium with its liquid phase at a given temperature.

3. **Factors Affecting Aqueous Tension**: The aqueous tension is influenced by the evaporation of water. As water evaporates, it increases the amount of water vapor in the gas, thereby increasing the aqueous tension.

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