Which of the following processes is not involved in making surface water potable?

Options

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

Explanation

To determine which process is not involved in making surface water potable, we need to analyze the processes typically used in water treatment. Here’s a step-by-step breakdown:

### Step 1: Understand Potable Water
- **Definition**: Potable water is water that is safe for drinking and does not pose health risks.

### Step 2: Identify Common Water Treatment Processes
- **Sedimentation**: This is a physical process where gravity causes suspended solids to settle at the bottom of a container. This helps in removing larger particles from the water.
- **Filtration**: After sedimentation, filtration is used to remove smaller suspended particles. Water passes through filter paper, which traps these solids.
- **Chlorination**: This process involves adding chlorine to the water to kill harmful bacteria and pathogens, making the water safe for consumption.

### Step 3: Evaluate the Options
- The processes mentioned (sedimentation, filtration, and chlorination) are all standard methods used to treat surface water and make it potable.
- **Distillation**: This is a different process where liquid is heated to form vapor and then cooled to form liquid again. While it can purify water, it is not a standard method for treating surface water to make it potable.

### Conclusion
- The process that is **not involved** in making surface water potable is **distillation**.

### Final Answer
The process that is not involved in making surface water potable is **distillation**.

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