What is generally added for sterilization of water to make it fit for drinking purposes?

Explanation

To answer the question about what is generally added for the sterilization of water to make it fit for drinking purposes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Water Sterilization**:
- Water often contains impurities and microorganisms that can be harmful to health. Therefore, it is essential to sterilize water to make it safe for drinking.

2. **Identifying Common Disinfectants**:
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