Chemistry
Answer
(a) The process of removal of germs from water to avoid water borne diseases is known as sterilisation.
(b) The settling of suspended solid matter at the bottom of a liquid is called sedimentation.
(c) The process of adding a chemical to an impure liquid in order to increase the rate of sedimentation of suspended particles is called loading.
(d) Air under pressure is blown into the filtered water. This process is called aeration. It kills harmful micro-organisms present in the filtered water.
Related Questions
Which of the following is a water-borne disease?
- Influenza
- Typhoid
- COVID-19
- Malaria
Name:
(a) Two chemicals used to destroy germs present in water.
(b) Two diseases which spread through impure water.
(c) A chemical used for loading.
(d) Two substances which add taste to water.
(e) Two household methods to get safe drinking water.
What is the taste of distilled water? Why is it not potable ?
Answer in brief:
(a) Why is river water unfit for drinking ?
(b) Why is tap water a mixture ?
(c) What is mineral water?
(d) What is the purpose of adding bleaching powder to water supplied to the town?
(e) How is chemically pure water obtained in the laboratory?
(f) How is water in a swimming pool kept free from germs?
(g) Why is water important for plants and animals?