Which of the following conditions shows the polluted environment?
(i) pH of rainwater is 5.6.
(ii) Amount of carbon dioxide in the atmosphere is 0.03%.
(iii) Biochemical oxygen demand 10 ppm.
(iv) Eutrophication.
Which of the following conditions shows the polluted environment?
(i) pH of rainwater is 5.6.
(ii) Amount of carbon dioxide in the atmosphere is 0.03%.
(iii) Biochemical oxygen demand 10 ppm.
(iv) Eutrophication.
This is a Multiple choice Questions as classified in NCERT Exemplar
Options (iii) and (iv) are correct since clean water has BOD less than 5 ppm and polluted water has BOD value higher than 5 ppm. So, 10 BOD means highly polluted water. This process in which nutrient enriched water bodies support a
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Chemistry NCERT Exemplar Solutions Class 11th Chapter Fourteen 2025
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