Advertisements
Advertisements
Question
How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.
Advertisements
Solution
In the laboratory, dinitrogen is prepared by heating an aqueous solution of ammonium chloride and sodium nitrite.
\[\ce{NH4Cl_{(aq)} + NaNO2_{(aq)} ->[Heat] NaCl_{(aq)} + 2H2O_{(l)} + N2_{(g)}}\]
This reaction also produces trace amounts of nitric acid (HNO3) and nitric oxide (NO). By passing the developed gas through an aqueous sulphuric acid solution containing potassium dichromate, the resulting dinitrogen is purified.
RELATED QUESTIONS
What is the covalence of nitrogen in N2O5?
Explain why NH3 is basic while BiH3 is only feebly basic.
Tendency to show –3 oxidation state decrease from Nitrogn (N) to Bismuth (Bi).
The statement true for \[\ce{N^-_3}\] is ____________.
Nitrogen is relatively inactive element because ____________.
Among the 15th group elements, as we move from nitrogen to bismuth, the pentavalency becomes less pronounced and trivalency becomes more pronounced due to:
Pure nitrogen is prepared in the laboratory by heating a mixture of:
In which one of the following oxides of nitrogen, one nitrogen atom is not directly linked to oxygen?
Which of the following oxides of nitrogen reacts with FeSO4 to form a dark brown compound?
A deep brown gas is formed by mixing two colourless gases which are:
The laughing gas is ____________.
On heating lead nitrate forms oxides of nitrogen and lead. The oxides formed are ______.
Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
Assertion: \[\ce{HNO3}\] makes iron passive.
Reason: \[\ce{HNO3}\] forms a protective layer of ferric nitrate on the surface of iron.
Heating white phosphorus with conc. NaOH solution gives mainly ______.
