MCQ
A sample of $0.125\,g$ of an organic compound when analysed by Duma's method yields $22.78\,mL$ of nitrogen gas collected over $KOH$ solution at $280\,K$ and $759\,mm\,Hg$. The percentage of nitrogen in the given organic compound is.(Nearest integer).
$(a)$ The vapour pressure of water at $280 K$ is $14.2$ $mm Hg$
$(b)$ $R =0.082 L$ atm $K ^{-1} mol ^{-1}$
- ✓$22$
- B$23$
- C$21$
- D$20$