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1 : Which gases are responsible for greenhouse effect?

1 : SO2, NO2

2 : NO2, CO

3 : CO2, CH4

4 : O2, N2

2 : Indicator source of sulphur which is responsible for the presence of oxide of sulphur in the atmosphere.

1 : Decomposition of vegetation

2 : Waste gases from digestion of animals

3 : Photochemical smog

4 : Combustion of fossil fuels

3 : Which substance remains unaffected in the catalytic converter fixed in the exhaust of the automobiles?

1 : CO2

2 : CO

3 : NO

4 : No2

4 : Why smog not in summer?

1 : Because spoke is not present in summer

2 : Because due to heat of the earth the smoke rises up

3 : 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?

1 : Young adults

2 : Middle age people

3 : Children

4 : Bahut children and aged people

6 : In which area there is a better possibility of acid rain?

1 : Around village

2 : Around big cities

3 : Around industrial area

4 : Around water bodies

7 : Which catalyst is used in the catalytic converter fixed in the exhaust system of automobiles?

1 : Ni

2 : Cu

3 : Pt, Pd and Rh

4 : CaO

8 : Which components are essential for the formation of photochemical smog?

1 : CO, NO2, CO2

2 : NO2, volatile organic compound, sunlight

3 : CO2, NO2, sunlight

4 : Volatile organic compounds, NO2, CO

9 : Which gas is contribute towards the formation of acid rain?

1 : Oxides of carbons

2 : Oxides of sulphur

3 : Oxides of nitrogen

4 : Both of sides of nitrogen and Sulphur

10 : Concentration of which gas in the atmosphere is decreased by photosynthesis in plants?

1 : Oxygen

2 : Nitrogen

3 : Carbon dioxide

4 : Water vapours

11 : Which gas is primarily responsible for the greenhouse effect?

1 : Oxygen

2 : Carbon dioxide

3 : Nitrogen

4 : Hydrogen

12 : Which of the following is an example of a biodegradable pollutant?

1 : Plastic

2 : Pesticides

3 : Organic waste

4 : Heavy me

13 : Which of the following is a key concern in environmental chemistry?

1 : Impact of chemicals on health

2 : The properties of metals

3 : The creation of new substances

4 : Study of chemical bonding

14 : What is the main component of Earth's atmosphere?

1 : Oxygen

2 : Nitrogen

3 : Carbon dioxide

4 : Water vapo

15 : What percentage of the atmosphere is made up of nitrogen?

1 : 21%

2 : 78%

3 : 50%

4 : 90%

16 : Which gas is responsible for the depletion of the ozone layer?

1 : Carbon dioxide

2 : Methane

3 : Chlorofluorocarbons (CFCs)

4 : Water vapo

17 : Which of the following gases contributes the most to the Earth's greenhouse effect?

1 : Methane

2 : Carbon dioxide

3 : Nitrous oxide

4 : Nitrogen ande

18 : What is the primary source of carbon monoxide (CO) in the air?

1 : Car exhaust

2 : Agricultural activities

3 : Combustion of fossil fuels

4 : Volcanic eruptions

19 : What is the primary source of methane (CH.) emissions?

1 : Industrial processes

2 : Landfills

3 : Agricultural practices

4 : recycling

20 : Which pollutant is responsible for the formation of acid rain?

1 : Carbon monoxide

2 : Nitrogen oxides and sulfur dioxide

3 : Ozone

4 : Carbon monoxide

21 : What type of pollutant is smog?

1 : Primary

2 : Secondary

3 : Non-toxic

4 : Natural

22 : Which of the following is a source of nitrogen

1 : Car exhaust

2 : Solar radiation

3 : Volcanic eruptions

4 : plants

23 : Which of these is a common source of sulfur dioxide (SO₂) pollution?

1 : Combustion of fossil fuels

2 : Agriculture

3 : Forest fires

4 : Volcanoes

24 : Which of the following is a major air pollutant produced by vehicles?

1 : Ozone

2 : Nitrogen oxide

3 : Carbon monoxide

4 : All of the above

25 : Which of the following is an effect of acid rain on plants?

1 : Improved soil quality

2 : Aquatic life

3 : Enhanced photosynthesis

4 : Plants

26 : Which human activity releases the most carbon dioxide into the atmosphere?

1 : Deforestation

2 : Burning of fossil fuels

3 : All of the above

27 : What is the pH level of acid rain?

1 : 5.0

2 : 6.0

3 : 4.0

4 : 3.0

Chemistry 9th MCQs || Ilam Ghar