Which one of the following gas does not form a part of the atmosphere?
A
Nitrogen
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B
Chlorine
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C
Carbon dioxide
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D
Oxygen
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Solution
The correct option is B Chlorine Nitrogen (N2)−78%ofair, Carbon dioxide (CO2)−0.04%ofair and Oxygen(O2)−21%ofair are a part of the atmosphere but chlorine (Cl2) does not form a part of the atmosphere.