In Kjeldahl's method, 1.4 gm of an organic compounds is strongly boiled with concetration NaOH. If the liberated ammonia gas is completely absorbed by 100 ml 0.1 M `H_(2)SO_(4)` solution and no acid is remained , the mass percent of nitrogen in the compound is

Options

A. 0.2
B. 0.1
C. 0.4
D. 0.8

Answer

0.01

Explanation

`{:(2NH_(3),+,H_(2)SO_(4),to,(NH_(4))_(2)SO_(4)+2H_(2)O(l)),(20,,10,,):}`
mm of N=20
Wt of N =`20/1000 xx14=28/100=7/25 gm`
% of `N=7/25xx1000/14 =20 %`