Air Pollution

Q. Air is ___.

1. an element
2. a mixture
3. an atom
4. a compound

Q. Mention three ways to reduce air pollution.

Q.

Air is contaminated by unwanted substances that have harmful effects on both living and non-living objects. This is mainly called as _____________.

1. air purification

2. air conservation

3. air utilisation

4. air pollution

Q.

In November 2016, the national capital city, New Delhi had faced a severe increase in air pollution levels which continued for more than 2 weeks. Identify the major contributor(s) to this situation from the below-given options.

1. Vehicle emissions

2. Airways emission

3. Burning of stubble (crop residue) in the nearby farming villages
4. Cigarette smoking

Q.

Air quality of different cities were checked. Which of the following type of city will have relatively good air quality?

1. A city with more number of vehicles
2. A city with more number of trees
3. A city with more number of industries
4. A city with less number of water bodies

Q. Ozone depletion over Antarctica is due to the:

1. formation of chlorine nitrate ($\left(ClON{O}_2\right)$)
2. formation of $HCl$
3. formation of $HOCl$ and ${Cl}_2$ which are converted back into reactive $Cl$ atoms
4. None of the above

Q. Alina was asked to list the causes of air pollution. She made the following list:
A. Burning of Coal
B. Burning of Liquefied Petroleum Gas
C. Burning of Compressed Natural Gas
D. Exhaust from factories and industries
Which are the correct causes in this list?

1. Only A
2. A, B and C
3. A and B
4. All of the above

Q. Air is said to be a mixture because air at different places contains different amounts of various gases.

1. True
2. False

Q.

Which of the following are the causes of air pollution?

1. Deforestation.

2. Increase in the number of industries in residential areas.

3. Volcanic eruptions.

4. Use of fertilisers and insecticides.

Q. It is environmentally important to use unleaded petrol over leaded petrol.

1. False
2. True

Q. Which of the following are the sources of air pollution?

1. Factories
2. Dung cakes
3. Forests
4. Power plants

Q. Which of these things can be recycled and reused?

1. Newspaper
2. Banana peel
3. Cabbage
4. Wood

Q. __________ are the processes that balances oxygen and carbon dioxide in the atmosphere.

1. Photosynthesis
2. Combustion
3. Respiration
4. Reproduction

Q. _______ pollution is caused due to the presence of harmful substances in air.

1. Noise
2. Air
3. Soil
4. Water

Q. Which of the following is true about air?
(i) Air is a mixture of several gases.
(ii) Air exerts pressure.
(iii) The composition of air is constant at all places.

1. Only (i) and (ii)
2. Only (ii) and (iii)
3. Only (i) and (iii)
4. (i), (ii) and (iii)

Q. Smog is the mixture of ________.

1. smoke and water
2. smoke and fog
3. water and fog
4. smoke and oxygen

Q.

Which among the following are man-made sources of air pollution?
a. Burning of fire wood and dung cakes
​b. Forest fires
c. Factories
d. Power plants
e. Volcanoes
f. Automobiles

1. a, c, b, d and f

2. b, d and e

3. a, c, and f

4. a, c, d and f

Q.

Air pollution is caused by:

1. Loudspeakers
2. Planting trees
3. Forest fires
4. Oil Spills

Q. Ash from burning volcanoes, dust from storms and forest fires are the natural sources of ___ pollution.

1. air
2. water
3. radioactive
4. noise

Q.

What can you do to reduce air pollution ?

1. Use plastics
2. Cut trees
3. Take public transport
4. Burn crakers

Q.

Which among the following are man-made sources of air pollution?
a. Burning of fire wood and dung cakes
b. Forest fires
c. Factories
d. Power plants
e. Volcanoes
f. Vehicles

1. b, d and e

2. a, c, and f

3. a, c, d and f

4. a, c, b, d and f

Q.

Which of the following can be used to control air pollution?

1. Cheap fuel

2. Non-polluting fuel

3. Convenient fuel

4. All of these

Q. Which of the following is true about air?

1. Air is a mixture of several gases.
2. Air exerts pressure.
3. Composition of air is uniform.
4. Air has mass.

Q. Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen

Q.

Which of the following can be used to control air pollution?

1. Cheap fuel

2. Non-polluting fuel

3. Convenient fuel

4. All of these

Q. Statement 1: Travel by public transport (bus or train)
Statement 2 : Cycle or walk short distances instead of using a motor vehicle
From above statements, what kind of pollution can we mitigate?

1. Land (soil) pollution
2. Water pollution
3. Air pollution
4. All the above

Q. Suggest three measures to prevent air pollution. [3 marks]

Q. Statement 1: Travel by public transport (bus or train)
Statement 2 : Cycle or walk short distances instead of using a motor vehicle
From above statements, what kind of pollution can we mitigate?

1. Water pollution
2. Air pollution
3. Land (soil) pollution
4. All the above

Q. Choose the measures that can be taken to reduce air pollution.

1. Using bicycle for transportation
2. Reducing the use of firecrackers
3. Planting more trees
4. Burning garbage in open

Q. _________ prevents seeping of water into the soil.