Chemical Pollutants
Chemical Pollutants
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 | |||
Students / Parents Reviews [20]
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Om Umang
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Barkha Arora
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Shreya Shrivastava
8thAbhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thAbhyas 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...
Shreya Shrivastava
8thOne 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.
Aman Kumar Shrivastava
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Archit Segal
7thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thThird 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 ...
Ayan Ghosh
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Manya
8thIt 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.
Cheshta
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thUsually 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...
