When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;

When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;
A. Nitrogen and carbondioxide
B. Rare gases
C. Nitrogen and oxygen
D. Nitrogen and the rare gases

Correct Option: Answer is D

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