Question

Write a element name which is estimated quantitatively in an organic compound when it is heated with dry copper oxide in the atmosphere of co2 gas

Answer 1

Answer :- Nitrogen

Dumas Method of estimation of nitrogen :-

If Nitrogen containing organic compound is heated with excess copper oxide in an atmosphere of CO2 then free nitrogen is obtained along with CO2 and water.

Following are the reactions :-

C + 2CuO → CO₂ + 2Cu

2H + CuO → H₂O + Cu

Nitrogen + CuO → N₂ + oxides of nitrogen