Question

Given below are two statements I and II. 
Statement I: Dumas method is used for estimation of "Nitrogen" in an organic compound. 
Statement II: Dumas method involves the formation of ammonium sulfate by heating the organic compound with concentrated H\(_2\)SO\(_4\). In the light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are true
• B. Statement I is false but Statement II is true
• C. Both Statement I and Statement II are false
• D. Statement I is true but Statement II is false

Hint:

In the Kjeldahl method, the organic compound is digested with concentrated H\(_2\)SO\(_4\) to form ammonium sulfate. In the Dumas method, nitrogen is estimated by measuring the nitrogen gas evolved from the compound.

Answer 1

The Correct Option is D

Analysis of each statement is required to ascertain their veracity.

Statement I: The Dumas method quantifies "Nitrogen" in organic compounds.

This statement is accurate. The Dumas method is a foundational technique in organic chemistry for the quantitative determination of nitrogen within organic substances. The process entails combusting the compound in an oxygen-rich environment, transforming bound nitrogen into nitrogen gas (N₂), which is subsequently measured volumetrically.

Statement II: The Dumas method produces ammonium sulfate by heating the organic compound with concentrated H₂SO₄.

This statement is inaccurate. The Dumas method does not result in the formation of ammonium sulfate, nor does it employ concentrated sulfuric acid (H₂SO₄). The method involves combustion of the compound in an oxygen-rich atmosphere to generate nitrogen gas. This description appears to conflate with Kjeldahl's method, which converts nitrogen into ammonium sulfate using sulfuric acid.

Consequently, the accurate conclusion is: Statement I is accurate, while Statement II is inaccurate.