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1 : Which gases are responsible for greenhouse effect?
A
:
SO2, NO2
B
:
NO2, CO
C
:
CO2, CH4
D
:
O2, N2
2 : Indicator source of sulphur which is responsible for the presence of oxide of sulphur in the atmosphere.
A
:
Decomposition of vegetation
B
:
Waste gases from digestion of animals
C
:
Photochemical smog
D
:
Combustion of fossil fuels
3 : Which substance remains unaffected in the catalytic converter fixed in the exhaust of the automobiles?
A
:
CO2
B
:
CO
C
:
NO
D
:
No2
4 : Why smog not in summer?
A
:
Because spoke is not present in summer
B
:
Because due to heat of the earth the smoke rises up
C
:
Because in summer smoke and fog cannot mix with each other because less fossil fuels are burnt in summer
5 : People of which age groups are most affected by the air pollution?
A
:
Young adults
B
:
Middle age people
C
:
Children
D
:
Bahut children and aged people
6 : In which area there is a better possibility of acid rain?
A
:
Around village
B
:
Around big cities
C
:
Around industrial area
D
:
Around water bodies
7 : Which catalyst is used in the catalytic converter fixed in the exhaust system of automobiles?
A
:
Ni
B
:
Cu
C
:
Pt, Pd and Rh
D
:
CaO
8 : Which components are essential for the formation of photochemical smog?
A
:
CO, NO2, CO2
B
:
NO2, volatile organic compound, sunlight
C
:
CO2, NO2, sunlight
D
:
Volatile organic compounds, NO2, CO
9 : Which gas is contribute towards the formation of acid rain?
A
:
Oxides of carbons
B
:
Oxides of sulphur
C
:
Oxides of nitrogen
D
:
Both of sides of nitrogen and Sulphur
10 : Concentration of which gas in the atmosphere is decreased by photosynthesis in plants?
A
:
Oxygen
B
:
Nitrogen
C
:
Carbon dioxide
D
:
Water vapours
11 : Which gas is primarily responsible for the greenhouse effect?
A
:
Oxygen
B
:
Carbon dioxide
C
:
Nitrogen
D
:
Hydrogen
12 : Which of the following is an example of a biodegradable pollutant?
A
:
Plastic
B
:
Pesticides
C
:
Organic waste
D
:
Heavy me
13 : Which of the following is a key concern in environmental chemistry?
A
:
Impact of chemicals on health
B
:
The properties of metals
C
:
The creation of new substances
D
:
Study of chemical bonding
14 : What is the main component of Earth's atmosphere?
A
:
Oxygen
B
:
Nitrogen
C
:
Carbon dioxide
D
:
Water vapo
15 : What percentage of the atmosphere is made up of nitrogen?
A
:
21%
B
:
78%
C
:
50%
D
:
90%
16 : Which gas is responsible for the depletion of the ozone layer?
A
:
Carbon dioxide
B
:
Methane
C
:
Chlorofluorocarbons (CFCs)
D
:
Water vapo
17 : Which of the following gases contributes the most to the Earth's greenhouse effect?
A
:
Methane
B
:
Carbon dioxide
C
:
Nitrous oxide
D
:
Nitrogen ande
18 : What is the primary source of carbon monoxide (CO) in the air?
A
:
Car exhaust
B
:
Agricultural activities
C
:
Combustion of fossil fuels
D
:
Volcanic eruptions
19 : What is the primary source of methane (CH.) emissions?
A
:
Industrial processes
B
:
Landfills
C
:
Agricultural practices
D
:
recycling
20 : Which pollutant is responsible for the formation of acid rain?
A
:
Carbon monoxide
B
:
Nitrogen oxides and sulfur dioxide
C
:
Ozone
D
:
Carbon monoxide
21 : What type of pollutant is smog?
A
:
Primary
B
:
Secondary
C
:
Non-toxic
D
:
Natural
22 : Which of the following is a source of nitrogen
A
:
Car exhaust
B
:
Solar radiation
C
:
Volcanic eruptions
D
:
plants
23 : Which of these is a common source of sulfur dioxide (SO₂) pollution?
A
:
Combustion of fossil fuels
B
:
Agriculture
C
:
Forest fires
D
:
Volcanoes
24 : Which of the following is a major air pollutant produced by vehicles?
A
:
Ozone
B
:
Nitrogen oxide
C
:
Carbon monoxide
D
:
All of the above
25 : Which of the following is an effect of acid rain on plants?
A
:
Improved soil quality
B
:
Aquatic life
C
:
Enhanced photosynthesis
D
:
Plants
26 : Which human activity releases the most carbon dioxide into the atmosphere?
A
:
Deforestation
B
:
Burning of fossil fuels
C
:
All of the above
27 : What is the pH level of acid rain?
A
:
5.0
B
:
6.0
C
:
4.0
D
:
3.0
Chemistry 9th MCQs || Ilam Ghar
Chapter 10 : Environmental Chemistry
Chemistry 9th
