Question:
The process of 'eutrophication' is due to
The process of 'eutrophication' is due to
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Key causes of eutrophication: agricultural runoff (fertilizers), sewage discharge, and detergents containing phosphates.
Updated On: Apr 16, 2026
- increase in concentration of radioactive substances in water.
- the reduction in concentration of the dissolved oxygen in water due to phosphate pollution in water.
- increase in concentration of fluoride ion in water.
- increase in concentration of insecticide in water.
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Eutrophication is the enrichment of water bodies with nutrients, leading to excessive growth of algae and subsequent oxygen depletion.
Step 2: Detailed Explanation:
Eutrophication is caused by an excess of nutrients, particularly phosphates and nitrates, from fertilizers and sewage. These nutrients cause an algal bloom. When the algae die, their decomposition by bacteria consumes large amounts of dissolved oxygen, creating "dead zones" where aquatic life cannot survive. Therefore, it is characterized by a reduction in dissolved oxygen due to nutrient (phosphate) pollution.
Step 3: Final Answer:
Eutrophication is due to the reduction in dissolved oxygen from phosphate pollution, which corresponds to option (B).
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