What is water pollution? What are the principal sources of water

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 Multiple Choice QuestionsLong Answer Type

71.

What is acid rain? Discuss its harmful effects. 

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72.

Why does rain water normally have a pH of about 5.6? When does it become acid rain ?

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 Multiple Choice QuestionsLong Answer Type

73.

What is the cause of acid rain? How is it harmful to the environment?

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 Multiple Choice QuestionsShort Answer Type

74.

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

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75.

Why is acid rain considered a threat to Taj Mahal?

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 Multiple Choice QuestionsLong Answer Type

76.

What is green house effect and global warming?

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77.

What are the consequences of green house effect?
Or
What is the effect on the global warming due to the green house effect?

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 Multiple Choice QuestionsShort Answer Type

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78.

What is water pollution? What are the principal sources of water pollution?


Water pollution is defined as the contamination of water by foreign substances which make it harmful for the health of animals or plants or aquatic life and make it unfit for domestic, industrial and agricultural use. The principal sources of water pollution may be classified as:
(i) Organic matter
(ii) Organic chemicals
(iii) Oils
(iv) Plant nutrients
(v) Sediments
(vi) Heat
(vii) Inorganic chemicals and minerals
(viii) Pesticides
(ix) Detergents
(x) Radioactive wastes.

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 Multiple Choice QuestionsLong Answer Type

79.

What are the major causes of water pollution? Explain. 

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80.

What do you mean by BOD and COD? How are these determined?

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