Chemistry
Answer
The process of removing germs from water is called sterilization.
It can be done by following three methods :
- Boiling — Germs cannot exist at the temperature of boiling water. Therefore, prolonged boiling of water destroys them.
- Exposure to air and sunlight — Ozone present in air and sunlight kills the germs present in water.
- Chemical treatment — Chemicals like chlorine and ozone can kill the germs. Use of ozone to sterilise water is called ozonisation.
Related Questions
Give reason:
Water droplets can be seen outside a chilled water bottle.
What is potable water? List four characteristics of potable water.
Water pollution is caused due to the addition of:
- domestic sewage
- pesticides
- effluents
- all of the above
One of the methods to control water pollution is:
- using synthetic detergents
- passing wastewater through effluent and sewage treatment plants
- washing clothes and utensils near water bodies
- using more fertilizers, pesticides, etc.