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
Explain why NH3 is basic while BiH3 is only feebly basic.
Which of the following is a basic oxide?
(A) SiO2
(B) P4O10
(C) MgO
(D) Al2O3
Write balanced chemical equations for action of potassium permanganate on Warm conc. sulphuric acid
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:
Which of the following oxides is neutral?
The bonds present in N2O5 are ____________.
Which of the following oxides of nitrogen is a coloured gas?
Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C?
Which of the following can be used as anesthesia?
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.
On heating lead (II) nitrate gives a brown gas “A”. The gas “A” on cooling changes to colourless solid “B”. Solid “B” on heating with NO changes to a blue solid ‘C’. Identify ‘A’, ‘B’ and ‘C’ and also write reactions involved and draw the structures of ‘B’ and ‘C’.
Assertion: Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason: The reaction between nitrogen and oxygen requires high temperature.
