MEDIUM
8th CBSE
IMPORTANT
Earn 100

How is activated charcoal made and what is its role in the purification of water?

Important Questions on Pollution of Air and Water

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q A
Why is bleaching powder used for in the purification of water?
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q B
How does carbon monoxide affect us?
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q B
What is the advantage of using CNG in preference to petrol or diesel in automobiles?
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q B
Discuss three methods of preventing water pollution.
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q C
Name three pollutants (except dust and soot) of air and mention their sources.
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q C
Describe eutrophication.
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q C
Describe an activity to show that alum helps the suspended particles of water to settle down.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 16 - Pollution of Air and Water>Exercises>Q D
_____ is formed by the complete combustion of carbon. (Write the name of the compound)