The process of converting gas into liquid on cooling is called

Options

A. evaporation
B. condensation
C. diffusion
D. sublimation

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process of converting gas into liquid when cooled.

2. **Identifying the Process**: The specific process that describes the conversion of gas to liquid is known as "condensation."

3. **Defining Condensation**: Condensation is defined as the process by which a gas is transformed into a liquid state when it is cooled to a certain temperature.

4. **Providing an Example**: A common example of condensation is when water droplets form on a cold surface from humid air. In this case, the water vapor (gas) in the air cools down and changes into liquid water droplets.

5. **Differentiating from Other Processes**: It is important to differentiate condensation from other processes:
- **Evaporation**: This is the process of converting a liquid into a gas.
- **Diffusion**: This is the movement of particles from an area of higher concentration to an area of lower concentration.
- **Sublimation**: This is the process of converting a solid directly into a gas without passing through the liquid state.

**Final Answer**: The process of converting gas into liquid on cooling is called **condensation**.

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