Pollution of Air and Water
Extra Questions
Question 1: How much nitrogen is present in air?
- 78%
- 68%
- 58%
- 48%
Answer: (a) 78%
Question 2: Which of these is not a greenhouse gas?
- Carbon dioxide
- Nitrogen
- Methane
- Sulphur dioxide
Answer: (b) Nitrogen
Question 3: Which of these can cause acid rain?
- Carbon dioxide
- Carbon monoxide
- Sulphur dioxide
- Hydrogen
Answer: (c) Sulphur dioxide
Question 4: Firewood is generally used as fuel in which of the following?
- Brick kiln
- Powerhouse
- Smelting unit
- Kitchen
Answer: (d) Kitchen
Question 5: Which of the following is a disease of respiratory system?
- Asthma
- Diarrhoea
- Cholera
- Jaundice
Answer: (a) Asthma
Question 6: Which system of the body is affected by jaundice?
- Excretory system
- Digestive system
- Nervous system
- Skeletal system
Answer: (b) Digestive system
Question 7: Which of these cities is situated on the bank of the Ganges?
- Delhi
- Agra
- Kanpur
- Lucknow
Answer: (c) Kanpur
Question 8: Eutrophication results in deficiency of which gas in water?
- Hydrogen
- Nitrogen
- Carbon dioxide
- Oxygen
Answer: (d) Oxygen
Question 9: Which substance is formed after reaction between CFCs and ozone?
- Oxygen
- Nitrogen
- Carbon dioxide
- Chlorine
Answer: (a) Oxygen