In the Dumas method, the nitrogen present in organic compound gets converted to…
a) Sodium Cyanide b) Gaseous Ammonia c) Dinitrogen Gas d) Ammonium Sulphate.
Answers
Answer:
Dumas' method
A known mass of the organic compound is heated with cupric oxide in an atmosphere of carbon dioxide. The carbon and hydrogen in the compound are oxidised to carbon dioxide and water respectively, while nitrogen is set free. Any oxide of nitrogen produced during this process, is reduced back to free nitrogen by heated copper gauze. The gaseous mixture consisting of CO
2
,H
2
O and N
2
is collected over an aqueous solution of potassium hydroxide. All the gases except nitrogen are absorbed by the solution. The volume of gas (nitrogen) collected is measured. From the volume of nitrogen obtained the percentage of nitrogen in the compound is calculated.
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Answer:
n the Dumas method, the nitrogen present in organic compound gets converted to c) Dinitrogen Gas.
Explanation:
In the Dumas method,
- it is a special type of procedure which is used to determine the molecular weight of an unknown substance given with the help of chemical reaction.
the Nitrogen present in the organic compound is basically heated in the presence of Copper oxide and in return it releases the Nitrogen Gas.
So, when N₂ present in the organic compound is heated with CuO then the resulting compound formed will be N₂ or dinitrogen gas along with the formation of carbon di oxide and water (CO₂ and H₂O respectively). The carbon di oxide thus produced is absorbed by potassium hydroxide(KOH).
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