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Business and Environmental Protection

Eutrophicatio...

Question

Eutrophication is low concentration of dissolved oxygen in water due to

A

Increase in the number of fishes and aquatic life

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B

Accelerated growth of algae caused by phosphate ions

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C

Contamination of water with acidic impurities

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D

Increased dissolution of $C O_{2}$ in water

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Solution

The correct option is B
Accelerated growth of algae caused by phosphate ions

Eutrophication is the process in which nutrient enriched water bodies support a dense plant population kills animal life by depriving it of $O_{2}$ and results in subsequent collapse of biodiversity

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Q. Eutrophication is the increased growth of algae in water that results in reduced sunlight penetration and depletion of dissolved in water.

Q. The overgrowth of algae due to phosphate can take up the oxygen in water and kill other aquatic life. This is called ________.

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Q. Which of the following statements regarding eutrophication are correct ?
(i) Eutrophication is the natural ageing of a lake by nutrient enrichment of its water.
(ii) Pollutants from human activities like effluents from the industries and homes can radically accelerate the aging process of a lake. This phenomenon is called as cultural or accelerated eutrophication.
(iii) The plant nutrients responsible for eutrophication are nitrates and phosphates.
(iv) These phosphates and nitrates accelerate the growth of algae, which utilise oxygen and may deoxygenate the water to kill the fish and other aquatic animals.

Q. The growth of fish gets inhibited if the concentration of dissolved oxygen in water is:

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