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ICSE Class 7 Chemistry Question 4 of 9

Air and Atmosphere — Question 6

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Question

Question 6

(a) What are the causes of air pollution?

(b) Suggest five measures to prevent air pollution.

Answer

(a) The causes of air pollution are:

  1. Natural process like volcanic eruptions, crop pollination etc.
  2. Burning of fuels and fibres.
  3. Deforestation
  4. Emission of harmful gases from vehicles.
  5. Use of chemicals like fertilizers, insecticides and pesticides in agricultural activities.
  6. Increase in number of industries.
  7. Use of chemical weapons in war.

(b) The five measures to prevent air pollution are:

  1. By growing more plants and trees.
  2. By installing tall chimneys with filters in factories and power plants.
  3. By using internal combustion engines in vehicles.
  4. By installing catalytic convertors in vehicles.
  5. Avoid burning of paper, garbage, dry leaves and other waste materials.