Chemical Pollutants


 
 
Concept Explanation
 

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.

 

                                                                                             

 

 

Sample Questions
(More Questions for each concept available in Login)
Question : 1

A ________________  is a substance or energy introduced into the environment that adversely affects the usefulness of a resource.

Right Option : A
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Explanation
Question : 2

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
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Explanation
Question : 3

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
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Explanation
 
 


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