Air Pollutants

Q. What is Deforestation? What are the Causes of Deforestation?

Q.

Question 2
Which of the following is not a source of air pollution?
(a) automobile exhaust
(b) burning of firewood
(c) windmill
(d) power plant

Q.

Which of the following describes the difference between pure air and polluted air?

1. Polluted air contains carbon dioxide whereas pure air does not.

2. Amount of carbon monoxide is much more in polluted air than pure air.

3. Pure air contains only oxygen gas.

4. Amount of sulphur dioxide and nitrogen dioxide is much more in polluted air than pure air.

Q. What are the reasons of deforestation

Q. Which of the following is not a cause of deforestation?

1. 
   Cultivation
2. 
   Afforestation
3. 
   Industrialisation
4. 
   Urbanisation

Q. What is claining?

Q. Question 5 (d)
Solution in brief.
What are the causes and consequences of deforestation?

Q.

While researching on various air pollutants, a scholar Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?

1. Hydrogen sulfide, $H_{2}S$

2. Hydrogen chloride, $HCl$

3. Carbon monoxide, $CO$

4. Sulphur dioxide, $S{O}_2$

Q.

Question 23
Find out the wrong statements and write them in their correct form.
(i) We can survive for some time without air but we cannot survive even for a few minutes without food.
(ii) A brick kiln emits a lot of smoke and other harmful gases causing air pollution.
(iii) Carbon monoxide is produced by the complete burning of fuels such as coal, petrol, diesel.
(iv) Chlorination is a commonly used chemical method for killing germs in water.
(v) Water which is suitable for drinking is called soft water.

Q. Which of the following is not a natural cause of deforestation?

1. Hurricane
2. Urbanization
3. Forest fire
4. Cyclone

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

1. True
2. False

Q. The movement that originated during the 1970s to end alienation of people from their local forests is ___.

1. Chipko movement
2. Clean and Green movement
3. GAP
4. Narmada Bachao Andolan

Q. Which of these are impacts of acid rain?

1. Helps plant growth
2. Decreases pH of water bodies
3. Increases acidity of the soil
4. Inhibit the activities of nitrogen fixing bacteria

Q.

What is deforestation? How is it caused?

Q. In a city, a thermal power plant produces a large amount of smoke while generating electricity. Which of the following problems is not a result of the smoke released by the factory?

1. Smog
2. Air borne disease
3. Acid rain
4. Breathing disorders

Q.

Write the chemical formulae and name the element present in Sulphur dioxide?

Q.

While researching on various air pollutants, Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?

1. Hydrogen sulphide

2. Hydrogen chloride

3. Carbon monoxide

4. Sulphur dioxide

Q. Which of the following is not a natural cause of deforestation?

1. Forest fire
2. Cyclone
3. Hurricane
4. Urbanization

Q. which of the following are causes of smoke emission?

1. Burning of dry leaves
2. Bursting crackers
3. Vehicles
4. Planting trees

Q. Which of the following is not an impact of deforestation?

1. loss of habitat
2. increasing pollution
3. increasing population
4. soil degradation

Q. How lichens help in indicating the pollutants in air?

Q. Removal of trees or other vegetation from an area for industrial, agricultural or other purposes is called as __________.

1. deforestation
2. reforestation
3. clearing
4. none of these

Q. Choose the properties of carbon monoxide gas.

1. Pungent odour
2. Red-orange colour
3. Colourless
4. Poisonous

Q. What is deforestation? How is it caused?

Q. Which of the following has been causing most damage to the Taj Mahal?

1. Acid rain
2. Global warming
3. Dust
4. Smoke

Q. Which of the following is not a natural cause of deforestation?

1. Hurricane
2. Forest fire
3. Agriculture
4. Drought