Which method of water purification does not kill microorganisms?

Options

A. Boiling
B. Filtration
C. Chlorination
D. Distillation

Explanation

**Step-by-Step Solution:**

1. **Understanding Water Purification Methods**: There are several methods of water purification, including boiling, filtration, chlorination, and distillation. Each method has different effects on microorganisms present in the water.

2. **Boiling**: Boiling water involves heating it to 100 degrees Celsius. This process effectively kills harmful microorganisms. Therefore, boiling does not qualify as a method that does not kill microorganisms.

3. **Filtration**: Filtration is a process where water is passed through a filter that can trap impurities, including microorganisms. However, the key point is that while the filter separates these microbes from the water, it does not kill them. Thus, filtration is a method that does not kill microorganisms.

4. **Chlorination**: Chlorination involves adding chlorine to water, which acts as a disinfectant. Chlorine is known to kill bacteria and other harmful microorganisms. Therefore, chlorination does not fit the criteria of a method that does not kill microorganisms.

5. **Distillation**: Distillation is a process that involves boiling water and then condensing the steam back into liquid. This method also kills microorganisms due to the high temperature involved. Hence, distillation does not qualify as a method that does not kill microorganisms.

6. **Conclusion**: Based on the analysis of the different methods, the only method of water purification that does not kill microorganisms is **filtration**.

**Final Answer**: Filtration is the method of water purification that does not kill microorganisms.

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