An organic compound is boiled with ${\mathrm{HNO}}_3$, cooled and then treated with ${\mathrm{AgNO}}_3$, a white precipitate is obtained. The compound can be

Which of the organic compound will give red colour in Lassaigne's test?

An organic compound, on analysis, gave the following results :

(i) $0.73 \mathrm{g}$ of the compound gave $1.32 \mathrm{g}$ of carbon dioxide and $0.6 \mathrm{g}$ of water,

(ii) $0.365 g$ of the compound give $56 \mathrm{cc}$ of nitrogen at NTP. 

The percentage of carbon in the given compound will be?

An organic compound on analysis gave the following data:

(ii) $0.25 \mathrm{g}$ of the compound on analysis by Duma's method gave $32 \mathrm{mL}$ of nitrogen gas at $\mathrm{STP}$. Calculate the percentages of $\mathrm{N}$ and $\mathrm{O}$ in the organic compound if the percentage of the carbon and hydrogen is $40.36 \%$ and $8.9\%$ respectively.

$0.5 \mathrm{g}$ of an organic compound on Kjeldahl's analysis gave enough ammonia to just neutralize $10 {\mathrm{cm}}^3$ of $1 \mathrm{M}$${\mathrm{H}}_2{\mathrm{SO}}_4$.The percentage of nitrogen in the compound is:

(Atomic mass: $\mathrm{N}=14, \mathrm{H}=1$)

In an experiment $0.22 \mathrm{g}$ of magnesium pyrophosphate was produced from $0.1 \mathrm{g}$ of an organic compound. The percentage of phosphorus in it is:

(Atomic mass: $\mathrm{Mg}=24, \mathrm{P}=31, \mathrm{O}=16$)