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Question

Arrange the following in the decreasing order of their composition in the atmosphere.
Oxygen, Argon, Nitrogen, and Carbon dioxide.

A
Nitrogen < Oxygen < Argon < Carbon Dioxide
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B
Nitrogen < Oxygen < Carbon Dioxide < Argon
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C
Oxygen < Nitrogen < Carbon Dioxide < Argon
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D
Oxygen < Carbon Dioxide < Nitrogen < Argon
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Solution

The correct option is A Nitrogen < Oxygen < Argon < Carbon Dioxide
Air is a mixture of several gases. Nitrogen is the major component of air.
The composition of air is:
Nitrogen -78%
Oxygen -20.9%
Argon -0.90%
Carbon Dioxide -0.03%
Other gases -0.17%

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