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Published on: 29/10/2025
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Questions + Answers key
Take MCQ Science Test
1.
Which of the following is not a way to conserve water?
Replace
Reduce
Reuse
Recycle
2.
Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school?
Car
School bus
Autorickshaw
Scooter
3.
The Kyoto protocol is associated with one of the following.
Reduction in the use of chlorofluorocarbons
Reduction in the emission of greenhouse gases
Reduction in the cutting of forest trees
Reduction in pollution of fresh water sources
4.
Biological pollution in water is caused by
coal mines
domestic sewage and animal excreta
oil spills
chemicals like paint
5.
Potable water is the water which is
obtained from a river
obtained from a lake
pure and fit for drinking
used only for washing clothes
6.
Highest percentage of air consists of
oxygen
carbon dioxide
nitrogen
argon
7.
The phenomenon of 'marble cancer' is due to
soot particles
CFCs
log
acid rain
8.
The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is
air pollution
water pollution
soil pollution
noise pollution
9.
Which of the following will reach the earth in greater amounts if the amount of chlorofluorocarbons released into the air increases?
Infrared rays
X-rays
Gamma rays
Ultraviolet rays
10.
Which of the following is not a source of air pollution?
Automobile exhaust
Burning of firewood
Windmill
Powerplant
11.
Which of these can cause acid rain ?
Carbon monoxide
Carbon dioxide
Sulphur dioxide
Nitrogen
12.
Air is a mixture of various gases. One of the gas is 21% part of the air and is essential for the survival of human beings. This gas is
nitrogen
oxygen
ozone
argon
13.
Which of the following gases combines with the blood and prevents it from carrying oxygen?
Carbon monoxide
Carbon dioxide
Nitrogen oxide
Nitrogen trioxide
14.
Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. This occasion is called
Forest Conservation Day
Plantation month
Van Mahotsav
Wildlife week
15.
A pond contains clean water. Which of the following activities will produce least pollution of water?
Washing clothes in the pond
Bathing animals in the pond
Washing motor vehicles in the pond
Swimming in the pond
16.
Which of the following is nota greenhouse gas?
Carbon dioxide
Sulphur dioxide
Methane
Nitrogen
17.
Water which looks clean still has disease carrying _______and _____ impurities.
18.
Water which is suitable for ______ is called _______water
19.
While______your teeth, leaving the______ running may waste several_________of water.
20.
Many________ are responsible for causing __________pollution. Petroleum_______are a major source of_________ pollutants like_______ and________.
21.
When air is contaminated by______ substances which have a______effect on both the _____and _____it is referred to as_______
22.
The_______ of carbon dioxide in the atmosphere may be responsible for global warming.
23.
CFCs deplete the______
24.
Any undesirable change in the physical, chemical or biological characteristics of the natural environment is called______
25.
Bathing and washing near water bodies should be ______
26.
Taj Mahal
27.
Water pollution
28.
Potable water
29.
Pollutants
30.
Green house effect
31.
Global warming
32.
Chemical contamination
33.
Air pollution
34.
Chlorofluorocarbons
35.
Carbon monoxide
36.
Carbon dioxide
37.
Sulphur dioxide
38.
IR radiations
39.
SO2
40.
Condensed water vapour in air
41.
Oxides which affect vegetation
42.
Asthma
43.
Dysentery
44.
Marble cancer
45.
Smog
46.
Sulphur dioxide and nitrogen dioxide
47.
Carbon dioxide
48.
Water which is suitable for drinking is called soft water.
49.
Chlorination is a commonly used chemical method for killing germs in water.
50.
A brick kiln emits lot of smoke and other harmful gases causing air pollution.
51.
We can survive for sometime without air but we cannot survive even for a few minutes without food.
52.
Potable water is translucent.
53.
Refrigerators, air conditioners and aerosol sprays have CFC pollutant.
54.
Sulphur dioxide and nitrogen dioxide gases are responsible for acid rain.
55.
Water fit for drinking is potable water.
56.
Global warming is a serious threat for life on the earth.
57.
SO2, CO and NO2 oxides are polluting the gases.
58.
Ultraviolet radiations are absorbed by ozone.
59.
Who organized 'Say no to cracker' campaign?
60.
What is chlorination?
61.
Define potable water
62.
Name few alternative fuels to reduce pollution
63.
What is Kyoto Protocol?
64.
Define greenhouse effect
65.
What steps are taken by the Supreme Court to save Taj Mahal?
66.
What is smog?
67.
How are vehicles responsible for air pollution?
68.
What are air pollutants ?
69.
Write the composition of air by volume.
70.
We were imaging a time when clean air and water may no longer be available. Why?
1.
(a)
Replace
2.
3.
(b)
Reduction in the emission of greenhouse gases
4.
(b)
domestic sewage and animal excreta
5.
(c)
pure and fit for drinking
6.
(c)
nitrogen
7.
(d)
acid rain
8.
(a)
air pollution
9.
(d)
Ultraviolet rays
10.
(c)
Windmill
11.
(c)
Sulphur dioxide
12.
(b)
oxygen
13.
(a)
Carbon monoxide
14.
(c)
Van Mahotsav
15.
(d)
Swimming in the pond
16.
Nitrogen is not a greenhouse gas. It is naturally found in the air and is a major constituent of it.
17.
( )
microorganisms, dissolved
18.
( )
drinking,potable
19.
( )
Brushing,tap,litres
20.
( )
Industries,air,refineries,gaseous,sulpher dioxide,nitrogen dioxide
21.
( )
unwanted,harmful,living,air pollution
22.
( )
increase
23.
( )
ozone
24.
( )
Pollution
25.
( )
avoided
26.
( )
Air pollution
27.
( )
River Ganga
28.
( )
Safe drinking water
29.
( )
Contaminated air and water
30.
( )
CO2 gas trapping in excess
31.
( )
CO2
32.
( )
Industrial waste
33.
( )
Smoke and Dust
34.
( )
damage ozone layer
35.
( )
reduces oxygen carrying capacity of blood
36.
( )
green house effect
37.
( )
acid rain
38.
( )
CO2
39.
( )
Caused by smog
40.
( )
Fog
41.
( )
Nitrogen oxides
42.
( )
Caused by smog
43.
( )
Contamination of water
44.
( )
Corrosion of marble
45.
( )
Smoke and fog
46.
( )
Acid rain
47.
( )
Global warming
48.
(b)
49.
(a)
50.
(a)
51.
(b)
52.
(b)
53.
(a)
54.
(a)
55.
(a)
56.
(a)
57.
(a)
58.
(a)
59.
( )
Children from many schools organized "Sayno to cracker" to reduce air pollution during Diwali.
60.
( )
Chlorination is commonly used chemical method for purifying water.
61.
( )
Water that is suitable for drinking
62.
( )
CNG and LPG
63.
( )
Kyoto Protocol is an agreement to reduce the emission of green house gases.
64.
( )
The trapping of radiations from sun rays by earth's atmosphere is called greenhouse effect.
65.
( )
It has ordered industries to switch to cleaner fuels like CNG and LPG. The automobiles should switch over to unleaded petrol in Taj zone
66.
( )
A thick fog like layer in the atmosphere especially during winters, which is made of smoke and fog is called smog.
67.
( )
Vehicles produce high level of pollutants such as carbon monoxide, carbon dioxide, nitrogen oxide and smoke
68.
( )
The substances that contaminate the air are called air pollutants.
69.
( )
78% is nitrogen and about 21% of oxygen, 0.9% argon, 0.3%CO2, rest other gases
70.
( )
Due to environmental pollution
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