HARD
7th CBSE
IMPORTANT
Earn 100

With the help of an example, outline your role as an active citizen in relation to sanitation.

Important Questions on Wastewater Story

MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 31
What is Sewage? State the various ways in which we produce sewage in our homes? What is the name of underground pipelines which carry sewage from our homes to the wastewater treatment plants?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 32
Explain why, it is harmful to discharge untreated sewage into rivers, lakes or ground.
HARD
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 32
What is meant by the ‘treatment of sewage’? What is its main purpose?
HARD
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 33
Draw a labelled sketch of wastewater treatment plant. Describe the various steps involved in getting clear water from wastewater. Which fuel can be extracted during the process?
HARD
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 34
Explain the relation between sanitation and disease. State the various ways in which you can contribute in maintaining sanitation at public places.
HARD
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Long Answer Type Questions>Q 35
What is a septic tank? Describe the septic tank based toilet with the help of a labelled diagram. Where are septic tank toilets used?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Multiple Choice Questions (MCQs)>Q 36

Which of the following statements about ozone are correct? 

A. It is essential for breathing of living organisms.

B. It is used to disinfect water. 
C. It absorbs ultraviolet rays. 
D. Its proportion in air is about 3%.

MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 18 - Wastewater Story>Multiple Choice Questions (MCQs)>Q 37
Which of the following is not an inorganic impurity present in sewage?