The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method.
0.25 g of an organic compound gave 22.4 ml. of `N_(2)` at STP by Duma's method. The percentage of Nitrogen in the compound is

Options

A. `15%`
B. `28%`
C. `11.2%`
D. `14%`

Answer

C

Explanation

% of `N=("Vol. of " N_(2)" liberated")/("wt. of organic compound").(28)/(22400).100`
`=(22.4)/(0.25).(28)/(22400).100=11.2%`