SS2: Chemistry Theory Questions – Pollution

Question 1

(a) What are the main pollutants in air?

Answer: Smoke, soot, dust, CO₂ , CO, SO₂ , NO, NO₂ , CFCs and hydrocarbons

(b) What is acid rain?

Answer:  Acid rain occurs when gasses in the air (SO₂ , SO₃ , NO₂ etc.) dissolve in the rainwater.

Question 2

Give the cause and environmental hazard of each of the following

(a) Greenhouse effect

Answer:
Cause – Atmospheric pollutants CO₂ & CH₄
Hazards – Flooding, rise in sea level, global warming, and melting of ice caps on mountains

(b) Depletion of ozone layer

Answer:
Cause – CFC_s (Chloro-fluoro carbons)
Hazards – Skin cancer, sunburns, destruction of Food chain, Hindering of photosynthesisPhotosynthesis is the process by which green plants, and some algae and bacteria, convert the energy of sunlight into chemical energy. This energy is then used to synthesize carbohydrates such as... More.