Air and Water
Nitrogen gas makes up 78% of our atmosphere and nitrogen is also a part of many molecules essential to life like proteins, nucleic acids (DNA and RNA) and some vitamins.
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Single Choice
Which of the following substances is most useful in removing nitrogen from air?
APhosphorus
BLime water
Correct Answer
CCalcium carbide
DMagnesium
Solution
A mixture of nitrogen and carbon dioxide can be distinguished by passing it through lime water. Because nitrogen does not turn lime water milky and carbon dioxide forms carbonate with lime which makes lime water milky. From this we can conclude that nitrogen gas does not react with lime water, hence, it is most useful in removing nitrogen from air.
SIMILAR QUESTIONS
Air and Water
Nitrogen is also found in other biologically important compounds such as alkaloids and urea.
Air and Water
Pure nitrogen can be prepared from :
Air and Water
Nitrogen is liberated by the thermal decomposition of only :
Air and Water
Which of the following compounds produce $$N_2$$ on strong heating?
Air and Water
Oxidation of ammonia yields :
Air and Water
Explain why dry nitrogen gas cannot be collected by the displacement of air? How can it be collected?
Air and Water
A student confirms nitrogen to ,be neither acidic nor basic in nature on testing using litmus solution. Explain how did he reason out?
Air and Water
Why is the heating solution of ammonium chloride and sodium nitrite discontinued on evolution of nitrogen gas?
Air and Water
How is liquid nitrogen used for the recovery of steel from old cars?
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