JAMB - Chemistry (1999 - No. 10)
Nitrogen obtained from the liquefaction of air has a higher density than that obtained from nitrogen containing compounds because the former contains
water vapour
oxygen
carbon (IV) oxide
rare gases
Explanation
The correct answer is rare gases because when nitrogen is obtained from air, \(CO_2\) and \(O_2\) are removed by passing air through caustic soda and heated copper turnings respectively.
However, the nitrogen obtained this way contains about 1% by volume of rare gases as impurities, these rare gases make it denser than nitrogen obtained from nitrogen compounds like ammonia, etc
However, the nitrogen obtained this way contains about 1% by volume of rare gases as impurities, these rare gases make it denser than nitrogen obtained from nitrogen compounds like ammonia, etc
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