Class Notes NCERT Solutions for CBSE Students
NCERT 8th Class (CBSE) Science: Pollution of Water and Air – Quiz
23 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Pollution of Water and Air – Quiz:
- Water is renewed continuously in nature through the water cycle.
- Water containing harmful impurities is said to be polluted. Pollution occurs due to dumping of untreated sewage, factory wastes, or due to run off of pesticides and fertilizers into water sources.
- Water can be made potable by filtering and killing germs.
- Air is mainly polluted by suspended particulate matter, carbon monoxide, excess carbon dioxide, sulphur dioxide, nitrogen dioxide, CFCs and lead.
Quiz: Pollution of Water and Air
Suspended particulate matter causes asthma, bronchitis and allergic cold. Pollutant gases produce irritation in eyes, throat and lungs. The contamination of air by harmful toxic gases, smoke and dust etc., is called air pollution. The substances which cause pollution of the air are called air pollutants. Water pollution is degradation of the quality of water either due to addition of undesirable substances or removal of desirable substances that makes it unfit for use by humans, animals, industries and growth of natural biota.
- Question 1 of 23
1.
Which of these causes water pollution?
Correct
Wrong! Correct Answer is All of these
- Question 2 of 23
2.
Which of these processes cannot remove germs from water?
Correct
Wrong! Correct Answer is filtration through porous pot
- Question 3 of 23
3.
Which of these methods does not result in conservation of water?
Correct
Wrong! Correct Answer is cutting vegetation so that less water is lost by transpiration
- Question 4 of 23
4.
Which of the following is not a pollutant unless present in excess?
Correct
Wrong! Correct Answer is Carbon dioxide
- Question 5 of 23
5.
Which of the following gases combines with the blood and prevents it from carrying oxygen?
Correct
Wrong! Correct Answer is Carbon monoxide
- Question 6 of 23
6.
Which of these can cause acid rain?
Correct
Wrong! Correct Answer is Sulphur dioxide
- Question 7 of 23
7.
How much nitrogen is present in air?
Correct
Wrong! Correct Answer is 78%
- Question 8 of 23
8.
Which of these is not a greenhouse gas?
Correct
Wrong! Correct Answer is Nitrogen
- Question 9 of 23
9.
Firewood is generally used as fuel in which of the following?
Correct
Wrong! Correct Answer is Kitchen
- Question 10 of 23
10.
Which of the following is a disease of respiratory system?
Correct
Wrong! Correct Answer is Asthma
- Question 11 of 23
11.
Which system of the body is affected by jaundice?
Correct
Wrong! Correct Answer is Digestive system
- Question 12 of 23
12.
Which of these cities is situated on the bank of the Ganges?
Correct
Wrong! Correct Answer is Kanpur
- Question 13 of 23
13.
Eutrophication results in deficiency of which gas in water?
Correct
Wrong! Correct Answer is Oxygen
- Question 14 of 23
14.
Which substance is formed after reaction between CFCs and ozone?
Correct
Wrong! Correct Answer is Oxygen
- Question 15 of 23
15.
The Taj Mahal is being affected due to:
Correct
Wrong! Correct Answer is Air pollution
- Question 16 of 23
16.
Air pollution causes:
Correct
Wrong! Correct Answer is Respiratory diseases
- Question 17 of 23
17.
Which disease can be possible due to polluted water?
Correct
Wrong! Correct Answer is All of the above
- Question 18 of 23
18.
Sculptures or monuments and buildings are destroyed by
Correct
Wrong! Correct Answer is Acid rain
- Question 19 of 23
19.
Biological pollution in water is caused by:
Correct
Wrong! Correct Answer is Domestic sewage and animal excreta
- Question 20 of 23
20.
The ozone layer in our atmosphere protects us from the harmful effects of?
Correct
Wrong! Correct Answer is Ultra violet rays
- Question 21 of 23
21.
A substance used for disinfecting water is:
Correct
Wrong! Correct Answer is Potassium permanganate
- Question 22 of 23
22.
Addition of harmful and poisonous substances in our environment is called:
Correct
Wrong! Correct Answer is Pollution
- Question 23 of 23
23.
A poisonous gas emitted by Mathura Refinery and other industries in and around Taj which causes acid rain is:
Correct
Wrong! Correct Answer is Sulphur dioxide
