How is nitrogen prepared in the laboratory? Write the chemical equatio – InterviewSolution

1.	How is nitrogen prepared in the laboratory? Write the chemical equation of the reactions involved.
Answer» SOLUTION :In the laboratory, nitrogen is prepared by treating an AQUEOUS solution of ammonium chloride with sodium nitrite. `NH_4Cl (aq) + NaNO_2 (aq) toN_2(g) + NaCl (aq)+2H_2O(l)` It may be noted that small AMOUNTS of NO and `HNO_3`are also formed in this reaction as impurities. These are REMOVED by passing the gas through aqueous SULPHURIC acid containing potassium dichromate.

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