The difference between boiling and evaporation is that

Options

A. boiling causes a change of state of water while evaporation does not
B. evaporation can take place at any temperature while boiling can not
C. boiling causes reduction in volume of liquid while evaporation does not
D. changing of boiling liquid into vapour can be seen but evaporation cannot be seen

Explanation

To solve the question regarding the difference between boiling and evaporation, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Boiling and Evaporation**:
- Boiling is a rapid process that occurs when a liquid reaches its boiling point, leading to the formation of vapor bubbles within the liquid.
- Evaporation is a slower process that can occur at any temperature, where molecules at the surface of a liquid gain enough energy to enter the gas phase.

2. **Analyzing the Options**:
- **Option 1**: "Boiling causes a change of state of water while evaporation does not."
- **Analysis**: Both boiling and evaporation cause a change of state from liquid to gas. This option is incorrect.

- **Option 2**: "Evaporation can take place at any temperature while boiling cannot."
- **Analysis**: This statement is true. Evaporation occurs at all temperatures, while boiling occurs only at a specific temperature (the boiling point).

- **Option 3**: "Boiling causes reduction in volume of liquid while evaporation does not."
- **Analysis**: Boiling does lead to a reduction in liquid volume as it converts the liquid into vapor. However, evaporation also reduces the volume of liquid over time. This option is incorrect.

- **Option 4**: "Changing of boiling liquid into vapor can be seen but evaporation cannot be seen."
- **Analysis**: Boiling is visible as bubbles form and rise to the surface, while evaporation is a gradual process that is not easily observed. This statement is partially true but does not capture the primary difference between the two processes.

3. **Conclusion**:
- After analyzing all the options, the correct answer is **Option 2**: "Evaporation can take place at any temperature while boiling cannot."

### Final Answer:
The difference between boiling and evaporation is that **evaporation can take place at any temperature while boiling cannot**.