In which pollution zone of the river, growth of algae reappear?
The pollution zones in the river are divided into how many types?
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Which is the third zone of pollution in the river?
In which pollution zone of the river, the dissolved oxygen reduced to 0?
The fishes were present in the river, but algaes were not able to survive. What is the zone of pollution of the river?
In which pollution zone of the river, water retains its original dissolved oxygen concentration?
The following zones are formed in a polluted river under the self – purification process
The correct sequence in which these zones occur progressively downstream in a polluted river is:
In which pollution zone of the river, the concentration of D.O reduced to 40%?
14 videos|99 docs|98 tests
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14 videos|99 docs|98 tests
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