Question

Making wastewater safe to drink requires many steps.What is the purpose of adding a very small amount of chlorine during the WATER TREATMENT process?

To filter and remove large items.
To collect sedimentation.
To remove unwanted gases.
To kill bacteria that cause infection.

Answer 1

Answer: We add small amount of chlorine to water to kill bacteria that cause infection.

Explanation: Adding chlorine to water is called chlorination. It is done to remove unwanted materials like pathogens viruses, and bacteria. the effectiveness of chlorine added depends upon the water temperature, water pH, turbidity, etc.

chlorine is available in two formulations, as a dry powder or pellet. chlorination is more effective at a high temperature and a low pH.