Pollution Control

Q. Which of the following methods are used for the primary treatment of water ?

1. Screening
2. Sedimentation
3. Flocculation
4. Bioremediation

Q. Which of the following is not used for controlling air pollution?

1. Silencer
2. Scrubber
3. Fabric filter
4. Electrostatic precipitator

Q. Why and how is the sewage is treated before disposal?

Q. Write your counter views in a paragraph on the topic.
'Crackers should be burst to express happiness', on the basis of the views given below--Add a few more points.

Views It symbolizes joy. It illuminates the sky. Children enjoy it.

Begin your paragraph as 'I strongly oppose the conviction ...............'

Q. What are the stages involved in the secondary and tertiary treatment of water?

Q. Pick the odd one out from the following. Hint - Controlling air pollution.

1. Fabric filters
2. Electrostatic precipitators
3. Silencers
4. Scrubbers

Q. Identify the methods used in the primary treatment of water from the following:

1. Screening
2. Sedimentation
3. Flocculation
4. Bioremediation

Q. What are the health hazards involved in sericulture?