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The pollutants from man’s activities lik...

The pollutants from man’s activities like effluents from the industries and homes can radically accelerate the aging process. This phenomenon has been called

A

Cultural eutrophication

B

Natural eutrophication

C

Accelerated eutrophication

D

Both (a) & (c)

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The correct Answer is:
D
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Pollutants from man's activities like effluents from the industries and homes can radically accelerate the ageing process known as :

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.

Assertion : Cultural eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage, industrial effluents, etc. Reason : The prime contaminants from sewage and industrial effluents are nitrates and phosphates, which act as plant nutrients and overstimulate the growth of algae.

Create an aquatic food chain in a water body into which effluents flow from a pesticide factory. Diagrammatically represent and answer the following questions : (i) What is the phenomenon called? (ii) Explain biomagnification of pesticide.

A farmer wanted to separate the grains from the chaff. This can be achieved by the process called

Assertion Liquid waste products from industrial processes and domestic activity are termed as effluents. Reason Fertiliser factories, steel and textile sugar mills are some industries, which release effluents.

The material A is fossil fuel which is extracted from the earth. It is said to be formed from the buried , large land plants by a very slow process B. When A is heated in the absence of air in a process called C, then it gives three products D, E, and F. The product D is used as a reducing agent in the extraction of metals the product E is used as an industrial fuel whereas the product F has been traditionally used for metalling the roads . c) Name the processes (i) B and (ii) C.

The material A is fossil fuel which is extracted from the earth. It is said to be formed from the buried , large land plants by a very slow process B. When A is heated in the absence of air in a process called C, then it gives three products D, E, and F. The product D is used as a reducing agent in the extraction of metals the product E is used as an industrial fuel whereas the product F has been traditionally used for metalling the roads . b) What is (i) physical state , and (ii) colour of A ?

PHYSICS WALLAH-ENVIRONMENTAL ISSUES -LEVEL - 2
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  2. The molecular action of ultraviolet light is mainly reflected through:

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  3. A lake near a village suffered heavy mortality of fishes within a few ...

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  4. The pollutants from man’s activities like effluents from the industrie...

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  5. Particulate matter can be removed by various ways. A and B are one the...

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  6. The term Municipal Solid Waste (MSW) is generally used to describe :

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  7. In 1984, the Bhopal gas tragedy took place because methyl isocyanate :

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  8. The graph given below represents the effect of sewage discharge on som...

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  9. It has been recommended that storage of nuclear waste after sufficient...

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  10. The concept of Joint Forest Management (JEM) involves

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  11. Blood analysis of a patient reveals an unusually high quantity of carb...

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  12. Common indicator organism of water pollution is

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  13. Which one of the following pairs is mismatched ?

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  14. Identify the correctly matched pair

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  15. Study carefully the following figure representing greenhouse effect. ...

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  16. In almost all Indian metropolitan cities like Delhi, the major atmosph...

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  17. Match the columns- {:(,"Column A",,"Column B"),(A.,"Soil erosion",1....

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  18. Good ozone and bad ozone is found respectively in

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  19. Minamata disease was caused due to the consumption of

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  20. Which one of the following statements pertaining to pollutants is corr...

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