Pollutants : A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource.
Some chemical pollutants are :
Chlorofluorocarbons (CFCs) : Chlorofluorocarbons are the compounds containing carbon, chlorine and fluorine. These compounds are used as an insulating material in air conditioners and refrigerators. Chlorofluorocarbons are also used in shaving foam and cleaning agent. These chemical compounds (CFCs) react with the ozone gas and leads to the depletion of the ozone layer and formation of holes in it.
Lead : When petrol is burnt in automobiles it releases lead as a pollutant which is absorbed by our body. It is poisonous and can damage our brain, liver and kidneys.
Ground level Ozone : Ozone damages vegetation and ecosystem by inhibiting the ability of plants to open the microscopic pores on their leaves to breathe. It interferes the process of photosynthesis by reducing the amount of carbon dioxide the plants can process and release as oxygen.
A ________________ is a substance or energy introduced into the environment that adversely affects the usefulness of a resource. | |||
Right Option : A | |||
View Explanation |
Which of the following are correct ? (a) A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource. (b) Chlorofluorocarbons are the compounds containing carbon, chlorine and fluorine. (c) Ozone damages vegetation and ecosystem by inhibiting the ability of plants to open the microscopic pores on their leaves to breathe. | |||
Right Option : D | |||
View Explanation |
Which of the following are correct ? (a) Chlorofluorocalcium are also used in shaving foam and cleaning agent. (b) The chemical compounds (CFCs) react with the ozone gas which leads to the depletion of the ozone layer and formation of holes in it. (c) Ground level ozone interferes with the process of photosynthesis by reducing the amount of carbon dioxide the plants can process and release as oxygen. | |||
Right Option : B | |||
View Explanation |
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Abhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
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Third consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
We started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
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Usually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...