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Pollution of Air and Water

Extra Questions

Question 1: How much nitrogen is present in air?

1. 78%
2. 68%
3. 58%
4. 48%

Answer: (a) 78%

Question 2: Which of these is not a greenhouse gas?

1. Carbon dioxide
2. Nitrogen
3. Methane
4. Sulphur dioxide

Answer: (b) Nitrogen

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Question 3: Which of these can cause acid rain?

1. Carbon dioxide
2. Carbon monoxide
3. Sulphur dioxide
4. Hydrogen

Answer: (c) Sulphur dioxide

Question 4: Firewood is generally used as fuel in which of the following?

1. Brick kiln
2. Powerhouse
3. Smelting unit
4. Kitchen

Answer: (d) Kitchen

Question 5: Which of the following is a disease of respiratory system?

1. Asthma
2. Diarrhoea
3. Cholera
4. Jaundice

Answer: (a) Asthma

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Question 6: Which system of the body is affected by jaundice?

1. Excretory system
2. Digestive system
3. Nervous system
4. Skeletal system

Answer: (b) Digestive system

Question 7: Which of these cities is situated on the bank of the Ganges?

1. Delhi
2. Agra
3. Kanpur
4. Lucknow

Answer: (c) Kanpur

Question 8: Eutrophication results in deficiency of which gas in water?

1. Hydrogen
2. Nitrogen
3. Carbon dioxide
4. Oxygen

Answer: (d) Oxygen

Question 9: Which substance is formed after reaction between CFCs and ozone?

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Chlorine

Answer: (a) Oxygen

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