Which of the following conditions shows the polluted environment?

CHEMISTRY · Single correct · CBSE · Chemistry · Classification of Elements and Periodicity in Properties · Classification of Elements and Periodicity in Properties

Problem

Which of the following conditions shows the polluted environment? (1) pH of rain water is 5.6 (2) amount of carbondioxide in the atmosphere is 0.03% (3) biochemical oxygen demand 10 ppm. (4) eutrophication

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