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प्रश्न
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of ______.
पर्याय
Large number of mosquitoes.
Increase in the amount of dissolved oxygen.
Decrease in the amount of dissolved oxygen in water.
Clogging of gills by mud.
उत्तर
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of decrease in the amount of dissolved oxygen in water.
Explanation:
Organic waste consumes oxygen and therefore, dissolved oxygen in water decreases and fish in such polluted water die.
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संबंधित प्रश्न
What are the major causes of water pollution? Explain.
Classify the given sources of water pollution as natural and manmade:
(1) domestic waste
(2) dead animals
(3) oil spills
(4) ashes released due to forest fires
What are natural reasons for water pollution?
List two major harmful effects of the following:
Rivers contaminated with sewage.
Differentiate between chemical pollution and thermal pollution.
List the cause of water pollution.
Write notes on the following:
Algal Bloom
Why does water need conservation even though large oceans surround the landmasses?
Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes:
(i) enhanced growth of algae.
(ii) decrease in amount of dissolved oxygen in water.
(iii) deposition of calcium phosphate.
(iv) increase in fish population.
Household detergents are safe and non-contributors to water pollution.
