Question 1:

What are viable and non-viable particulates?

 

Question 2:

What is acid rain? What are its harmful effects?

 

Question 3:

What are different sources of soil-pollution?

 

Question 4:

What is the role of CO₂ in the greenhouse effect?

 

Question 5:

What is BOD?

 

Question 6:

Why is COD preferred over BOD?

 

Question 7:

What is siltation?

 

Question 8:

What are main sources of thermal pollution?

 

Question 9:

Why there is ozone depletion mainly over Antarctica?

 

Question 10:

Which gases are major air pollutants?

 

Question 11:

In which season the depletion of ozone on Antarctica takes place and when it is replenished?

 

Question 12:

Give three examples in which green chemistry has been applied?

 

Question 13:

Why is acid rain considered as threat to Taj Mahal?

 

Question 14:

What is Chlorosis?

 

Question 15:

What is anoxia or asphyxiation?

 

Question 16:

Explain giving reasons. ‘The presence of CO reduces amount of haemoglobin available in the blood for carrying oxygen to the body cells’.

 

Question 17:

Oxygen plays a key role in troposphere while ozone in stratosphere. Explain.

 

Question 18:

Why does rain water have a pH of about 5 – 6?

 

Question 19:

What are secondary pollutants? Give two examples.

 

Question 20:

What is humification?

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