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 Dumas and Kjeldahl Methods 

Statement I: The Dumas method is indeed used for the estimation of nitrogen in organic compounds. This method involves heating the compound in the presence of an oxidizing agent and collecting the nitrogen gas evolved. The nitrogen gas is then measured and used to calculate the amount of nitrogen in the sample. Therefore, Statement I is correct.

Statement II: The formation of ammonium sulfate by heating the organic compound with concentrated sulfuric acid (\( H_2SO_4 \)) is a characteristic of the Kjeldahl method, not the Dumas method. In the Kjeldahl method, nitrogen in the organic compound is converted into ammonium sulfate, which is then analyzed. This is different from the Dumas method, which does not involve ammonium sulfate formation. Therefore, Statement II is incorrect.

Conclusion:

The correct answer is \( \boxed{(4)} \), as Statement I is correct and Statement II is incorrect.