InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
What is the basic cause of pollution? |
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Answer» 1. Exponential growth of human population coupled with industrial development is the main cause of imbalance in all the ecosystems. 2. There is also excessive utilization and production of synthetic materials and construction activities. 3. These together have caused several undesired substances in ecosphere. 4. This dumping of substances has resulted in severe pollution. |
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| 352. |
Which is the major cause of atmospheric air pollution and how can it be avoided? |
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Answer» 1. Automobiles are the major cause for atmospheric (air) pollution. 2. Regular maintenance of vehicles and use of lead-free petrol or diesel can reduce air pollution as lesser pollutants are released from the exhausts. 3. Using public transport and carpooling can be done to reduce number of automobiles on the road. |
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| 353. |
Choose the correct statement (a) Concentration of DDT in the water declined with the passing time. (b) Concentration of DDT in the water remains the same over many years without any effect. (c) If concentration of DDT starts at 0.003 ppb in water, it can ultimately reach 25 ppm in fish-eating birds. (d) If concentration of DDT is 25 ppm in water, in fish-eating bird population it reduces to 0.003 ppb later. |
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Answer» (c) If concentration of DDT starts at 0.003 ppb in water, it can ultimately reach 25 ppm in fish-eating birds |
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| 354. |
Which substances can cause biomagnification ? |
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Answer» Those substance like some pesticides which are non-biodegradable and those which get accumulated in the tissues of living organisms without metabolism or excretion, cause biomagnification. |
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| 355. |
Which two substances are well-known for biomagnification ? (a) Mercury and DDT(b) Cadmium and Lead (c) Petroleum hydrocarbons and sewage (d) Paper manufacturing effluents and copper |
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Answer» Correct option is (a) Mercury and DDT |
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| 356. |
Give definition of the following :Deforestation |
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Answer» Deforestation is conversion of forest area into non-forest area. |
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| 357. |
Give definition of the following :Biological Magnification (Biomagnification) : |
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Answer» Biological magnification is the phenomenon through which certain pollutants get accumulated in tissues in increasing concentration along the food chains in successive trophic levels. |
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| 358. |
What is Montreal Protocol? |
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Answer» 1. Montreal Protocol was signed agreement of an international treaty among different nations who had recognised the harmful effects of ozone depletion. 2. It was signed at Montreal (Canada) in 1987 to control emission of ozone depleting substances. 3. After signing of Montreal protocol and its subsequent execution in 1989, the ozone depletion has been reduced worldwide. |
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