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# Solution for Differentiate Between the Principle of Estimation of Nitrogen in an Organic Compound By Dumas Method - CBSE (Science) Class 11 - Chemistry

ConceptQuantitative Analysis of Nitrogen

#### Question

Differentiate between the principle of estimation of nitrogen in an organic compound by Dumas method

#### Solution 1

In Dumas method, a known quantity of nitrogen containing organic compound is heated strongly with excess of copper oxide in an atmosphere of carbon dioxide to produce free nitrogen in addition to carbon dioxide and water. The chemical equation involved in the process can be represented as

CxHyNz + (2x + "y/2") CuO -> xCO_2 + "y/2H"_2O + "z/2N"_2 + (2x + "y/2")Cu

The traces of nitrogen oxides can also be produced in the reaction, which can be reduced to dinitrogen by passing the gaseous mixture over a heated copper gauge. The dinitrogen produced is collected over an aqueous solution of potassium hydroxide. The volume of nitrogen produced is then measured at room temperature and atmospheric pressure

#### Solution 2

Dumas method: The organic compound is heated strongly with excess of CuO ‘ (Cupric Oxide) in an atmosphere of CO2 when free nitrogen, CO2 and H2O are obtained.

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#### APPEARS IN

NCERT Solution for Chemistry Textbook for Class 11 (2016 to Current)
Chapter 12: Organic Chemistry - Some Basic Principles and Techniques
Q: 22.1 | Page no. 363
Solution Differentiate Between the Principle of Estimation of Nitrogen in an Organic Compound By Dumas Method Concept: Quantitative Analysis of Nitrogen.
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