Test Details

Pollution Of Air And Water

Jan 31, 1:45 PM

35 minutes

Jan 31, 2:20 PM

80.0 marks

MCQ

40 questions

Sambhu Sir,

Class Details

General Science

Class VIII

General Science

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Question Text

Question 1 :
Which gas is produced by combustion of fuels like coal in power plants and can cause respiratory problems?

Question 4 :
The trapping of radiations by the earth’s atmosphere is similar. That is why it is called the -

Question 5 :
Is there a need to switch over to alternative fuels instead of the fossil fuels for our energy requirements, like solar energy, hydropower and wind energy?

Question 8 :
In the following statements, the words in inverted commas are jumbled up. Write them in their correct form. Air contains 78% 'ginroten' and 21% 'gonexy'.

Question 9 :
Name the chemicals which are used in refrigerators and air conditioners and damage ozone layer when released in air.

Question 11 :
In the following statements, the words in inverted commas are jumbled up. Write them in their correct form. Carbon dioxide, 'thaneme', nitrous oxide and water vapour are known as 'heengrouse sesga'.

Question 12 :
How much % of the world’s population is without safe drinking water?

Question 15 :
Which of the following is not a way to conserve water?

Question 17 :
State True or False. The increasing population and industrialisation have damaged this mighty river beyond repair.

Question 18 :
The bacteria present in the faeces of mammals are indicators of

Question 19 :
The smog causes breathing difficulties such as _____ , ______and ______ in children.

Question 20 :
State True or False. The Gangotri glacier in the Himalayas has started melting because of global warming.

Question 21 :
River which is famous in India and sustains most of the northern central and eastern Indian population-

Question 22 :
State True or False. The sources of air pollutants are factories, power plants, automobile exhausts and burning of firewood and dung cakes.

Question 23 :
State True or False. It is not only living organisms that get affected by polluted air but non-living things like buildings, monuments and statues also get affected.

Question 24 :
Suspended particulate matter, such as the soot particles emitted by _______ refinery, has contributed towards the yellowing of the marble of Taj Mahal.

Question 25 :
Smoke may contain ______ which combine with other air pollutants and fog to form smog.

Question 26 :
State True or False. Carbon monoxide is produced by complete burning of fuels such as coal, petrol, diesel.

Question 30 :
Which of the following procedures will give you water free from all impurities?

Question 31 :
While brushing your teeth, leaving the tap running may waste ______

Question 32 :
Gases like methane, nitrous oxide contribute towards rising temperature of earth's atmosphere. What are they called?

Question 34 :
The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is ________.

Question 35 :
Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called _____.

Question 37 :
Oil refineries, paper factories, textile and sugar mills and chemical factories. How do these industries cause harm to water?

Question 38 :
State True or False. Water which is suitable for drinking is called soft water.

Question 39 :
The average temperature of the earth’s atmosphere is gradually increasing. What is it called?

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