`0.256` g of some nitrogenous compound was kjeldahlised and produced `0.155` g of ammonia. The % of nitrogen in the organic compound is approximately

Options

A. 5
B. 30
C. 50
D. 80

Answer

C

Explanation

`0.17g NH_(3)` will contain `((14)/(17) xx 0.17)g` of nitrogen, i.e., 0.14g of nitrogen
% Nitrogen `= ("Mass of nitrogen")/("Mass of compound") xx 100 = (0.14)/(0.28) xx 100 = 50%`