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Environmental Chemistry
What is smog? How is classical smog different from photochemical smog?
The combination of smoke and fog is called smog. The main points of difference are given below:
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Classical smog |
Photochemical smog |
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1. It is formed due to the presence of SO2 and humidity in the air which combine to form H2SO4 fog which deposits on the particulate. |
It is formed due to the photochemical reaction taking place when the air contains NO2 and hydrocarbons. |
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2. It is formed in the months of winter during morning hours when the temperature is low. |
It is formed in the months of Summer during the afternoon when there is a bright sunlight. |
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3. It is reducing in character. |
It is oxidising in character. |
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4. It causes problems in the lungs. |
It causes irritation in the eyes. |
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In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases?
What is the size range of particulates?
How particulates help in the cloud formation?
Name three gases which are major air pollutants.
What are primary and secondary pollutants of the air?
Which zone is called ionosphere?
Give one harmful effect of classical smog.
What is PAN?
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