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Environmental Chemistry
Describe quality parameters and standards for drinking water.
The following parameters must be followed before water is supplied for drinking purposes:
(i) It must be colourless and free from any odour or smell.
(ii) Its pH should be between 6·0 to 9·0.
(iii) It must be free from harmful chemicals.
(iv) It should be free from micro-organisms which lead to many diseases.
(v) Its turbidity should be less than 10 ppm.
(vi) It should be reasonably soft.
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Give one harmful effect of classical smog.
What is PAN?
What is the nature of London smog and photochemical smog?
Which acids are present in the acid rain?
What is marine pollution?
Define chemical oxygen demand (COD).
Why is COD preferred over BOD?
Which main compounds are causing damage to ozone layer?
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