Question

Write down the condition and chemical reaction for the preparation of nitrogen gas in laboratory

Answer 1

An aqueous solution of ammonium chloride is treated with sodium nitrite.

NO and HNO3 are produced in small amounts. These are impurities that can be removed on passing nitrogen gas through aqueous sulphuric acid, containing potassium dichromate

Answer 2

Answer:

An aqueous solution of ammonium chloride is treated with sodium nitrite.

NH4Cl (aq ) + NaNO2 →N2(g) + 2H2O(l) + NaCl(aq)

NO and HNO 3

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 are produced in small amounts. These are impurities that can be removed on passing nitrogen gas through aqueous sulphuric acid, containing potassium dichromate.