question_answer

The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. The organic compound is

A) acetamide          

B) benzamide

C) urea                      

D)        thiourea

Correct Answer: C

Solution :

(i) To find the organic compound we must calculate the percentage of nitrogen in organic compound. The percentage of nitrogen in organic compound can be calculated by Kjeldhal   process, (ii) Match the calculated percentage of nitrogen with all the given organic compound.                       Let unreacted\[0.1\,M\,(=0.2\,N){{H}_{2}}S{{O}_{4}}\,=V'mL\] 20 mL ofof   Used % Nitrogen wherenormality of volume ofused %Nitrogen % of nitrogen in