Some Basic Principles Of Organic Chemistry Question 101
Question: 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 [AIEEE 2004]
Options:
A) Urea
B) Benzamide
C) Acetamide
D) Thiourea
Show Answer
Answer:
Correct Answer: A
Solution:
Equivalent of $ NH_3 $ evolved $ =\frac{100\times 0.1\times 2}{1000}-\frac{20\times 0.5}{1000} $
$ =\frac{1}{100} $ percent of nitrogen in the unknown organic compound $ =\frac{1}{100}\times \frac{14}{0.3}\times 100=46.6 $ % percent of nitrogen in urea $ {{(NH_2)}_2}CO $
$ =\frac{14\times 2}{60}\times 100=46.6 $ %
$ \therefore $ The compound must be urea.
