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SS2: CHEMISTRY - 2ND TERM

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  1. Water & Solution I | Week 1
    10 Topics
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    1 Quiz
  2. Water, Solution and Solubility | Week 2 & 3
    9 Topics
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    1 Quiz
  3. Air | Week 4
    4 Topics
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    1 Quiz
  4. Pollution | Week 5
    6 Topics
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    1 Quiz
  5. Rate of Chemical Reaction | Week 6 & 7
    6 Topics
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    1 Quiz
  6. Energy and Energy Effect I | Week 8 & 9
    7 Topics
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  7. Energy and Energy Effect II | Week 10 & 11
    6 Topics
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    1 Quiz
  8. Chemical Equilibrium | Week 12
    8 Topics
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SS2: CHEMISTRY – 2ND TERM Pollution | Week 5 SS2: Chemistry Theory Questions – Pollution
Lesson 4, Topic 6
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SS2: Chemistry Theory Questions – Pollution

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Question 1:

(a) What are the main pollutants in air?
(b) What is acid rain?

View Answers

Question 2:

Give the cause and environmental hazard of each of the following
(a) Green house effect
(b) Depletion of ozone layer

View Answers

Question 3:

(a) What is pollution?
(b) List the four types of pollution
(c) Give two examples of air pollutants that cause acid rain

View Answers

Question 4:

(a) Give two examples of soil pollutants and explain why they are pollutants.
(b) Give two ways by which pollution can be prevented.

View Answers

Question 5:

(a) What is noise pollution?
(b) List five causes of noise pollution.

View Answers

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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 – CFCs (Chloro-fluoro carbons)
Hazards – Skin cancer, sunburns, destruction of Food chain, Hindering of photosynthesis.

Question 3

(a) What is pollution?

Answer:

Pollution is the process in which the quality of the environment is lowered due to the addition of impurities by man which constitutes a danger to our health or natural resources.

(b) List the four types of pollution

Answer:

– Water Pollution
– Land Pollution
– Air Pollution
– Noise Pollution

(c) Give two examples of air pollutants that cause acid rain

Answer: SO2 and NO2

Question 4

(a) Give two examples of soil pollutants and explain why they are pollutants.

Answer:

Refuse – provide breeding grounds for insects and harbours germs

Pesticides and herbicides – causes death of aquatic lives


(b) Give two ways by which pollution can be prevented.

 Answer:

– Indiscriminate use of pesticides and herbicides must be discouraged
– Government should guide against indiscriminate dumping of refuse and chemicals

Question 5

(a) What is noise pollution?

Answer:

Noise pollution is an impairment of the environmental quality of the air by noise


(b) List five causes of noise pollution.

Answer:

– Aeroplane
– Guns
– Musical sets
– Television sets
– Bombs (atomic)

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