Question 3
Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?

Question 5
Statues and monuments in India are affected by acid rain. How?

Question 8
What are the harmful effects of photochemical smog and how can they be controlled?

Question 9
What are the reactions involved for ozone layer depletion in the stratosphere?

Question 10
What do you mean by ozone hole? What are its consequences?

Question 11
What are the major causes of water pollution? Explain.

Question 12
Have you ever observed any water pollution in your area? What measures would you suggest to control it?

Question 13
What do you mean by Biochemical Oxygen Demand (BOD)?

Question 14
Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?

Question 15
What are pesticides and herbicides? Explain giving examples.

Question 16
What do you mean by green chemistry? How will it help decrease environmental pollution?

Question 17
What would have happened if the greenhouse gases were totally missing in the earth's atmosphere? Discuss.

Question 19
How can domestic waste be used as manure?