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Class 11ChemistryEnvironmental ChemistryEnvironmental Study
Medium

Dissolved oxygen is essential for aquatic life. What are the reasons responsible for the depletion of dissolved oxygen in water?

  • A
    Use of phosphate and nitrate-based fertilizers
  • B
    Discharge of sewage and organic waste from food and paper mills
  • C
    Microbial oxidation of organic matter
  • D
    All of the above
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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Environmental Chemistry

Subtopic

Environmental Study

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