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Science TN
6th Std
Ch-11: Air
3.
Atmosphere
Exercise condition:
1
m.
__________ and __________ are the two gases, which when taken together, make up about \(99\) percentage of air.
I. Nitrogen
II. Carbon-di-oxide
III. Noble gases
IV. Oxygen
I and II
I and III
II and IV
I and IV
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