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प्रश्न
What is non-degradable pollutants?
उत्तर
The pollutants which cannot be decomposed by the natural biological processes are called Non-bio-degradable pollutants.
Examples:
Metal wastes (mainly Hg and Pb), D.D.T, plastics, nuclear wastes, etc.,
These pollutants are harmful to live organisms even in low concentrations. As they are not degraded naturally, it is difficult to eliminate them from our environment.
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संबंधित प्रश्न
What is the difference between pollution and pollutants?
What are the effects of air pollution on human health?
What is the source of pollution along the banks of Ganga?
Which town along the banks of Yamuna is polluted?
Name the anthropogenic sources of water pollution.
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ______.
Which of the following conditions shows the polluted environment.
(i) pH of rain water is 5.6.
(ii) amount of carbondioxide in the atmosphere is 0.03%.
(iii) biochemical oxygen demand 10 ppm.
(iv) eutrophication.
Match the activity given in Column I with the type of pollution created by it given in Column II.
| Column I (Activity) | Column II (Effect) | ||
| (i) | Releasing gases to the atmosphere after burning waste material containing sulphur. |
(a) | Water pollution |
| (ii) | Using carbamates as pesticides | (b) | Photochemical smog, damage to plant life, corrosion to building material, induce breathing problems, water pollution |
| (iii) | Using synthetic detergents for washing clothes |
(c) | Damaging ozone laye |
| (iv) | Releasing gases produced by automobiles and factories in the atmosphere. |
(d) | May cause nerve diseases in human. |
| (v) | Using chlorofluorocarbon compounds for cleaning computer parts |
(e) | Classical smog, acid rain, water pollution, induce breathing problems, damage to buildings, corrosion of metals. |
Assertion (A): If BOD level of water in a reservoir is less than 5 ppm it is highly polluted.
Reason (R): High biological oxygen demand means low activity of bacteria in water.
Which of the following is the largest contributor to water pollution in India?
