Which of the following procedures will give you water free from all impurities?

Options

A. adding chlorine tablets
B. boiling
C. distillation
D. filtration

Answer

To determine which procedure will give you water free from all impurities, let's analyze the options provided:

### Step-by-Step Solution:

1. **Understanding the Options**:
- The question asks for a method that can purify water completely, removing all types of impurities.

2. **Option 1: Adding Chlorine Tablets**:
- Chlorine is commonly used to disinfect water. It kills bacteria and microbes, preventing waterborne diseases. However, it does not remove physical impurities or chemical contaminants.
- **Conclusion**: This option does not provide water free from all impurities.

3. **Option 2: Boiling**:
- Boiling water is effective in killing bacteria and viruses. It is a good method for disinfection. However, it does not remove chemical pollutants or heavy metals.
- **Conclusion**: This option does not provide water free from all impurities.

4. **Option 3: Distillation**:
- Distillation involves heating water to create steam and then cooling the steam back into liquid water. This process effectively removes a wide range of impurities, including bacteria, heavy metals, and chemical contaminants.
- **Conclusion**: This option is the most effective for obtaining water free from all impurities.

5. **Option 4: Filtration**:
- Filtration can remove suspended particles and some impurities from water, but it does not eliminate dissolved substances, bacteria, or viruses.
- **Conclusion**: This option does not provide water free from all impurities.

### Final Answer:
The procedure that will give you water free from all impurities is **Distillation**.

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