Which is the most abundant gas in our atmosphere ?
A
Nitrogen
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B
Oxygen
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C
Carbon dioxide
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D
Carbon monoxide
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Solution
The correct option is A Nitrogen
Nitrogen (78%) and oxygen (21%) are two gases that make up the bulk of the atmosphere. Carbon dioxide, helium, ozone, argon and water vapour make up 1% of the rest of the atmosphere. Carbon monoxide is not a part of our atmosphere.