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Gas A, found in the upper layers of the atmosphere, is a deadly poison but is essential for all living beings. The amount of this gas started declining sharply in the 1980s.
a. Identify Gas A. How is it formed at higher levels of the atmosphere?
b. Why is it essential for all living beings? State the cause for the depletion of this gas.
Answer'
Name of Gas
Ozone Gas O 3
How formed
We know that Oxygen is present in atmosphere
It is broken down because of Ultraviolet rays of sun to form free Oxygen Molecules
O 2 ----->O + O
These free oxygen react with Oxygen gas to form Ozone
O 2 +O---->O 3
Why Essential
Ozone layer helps to prevent us from harmful ultraviolet radiaton from the sun
Why is it Depleting
It is depleting due to the use of Chlorofluorocarbon (CFC) which is used in Refrigerators, Air Conditioners and Fire extinguishers
