Qualitative Analysis of Organic Compounds

The compound formed in the positive test for nitrogen with the Lassaigne's solution of an organic compound is

Explain the method for the detection of phosphorus.

What is the colour of the ammonium phosphomolybdate precipitate which is formed during the detection of phosphorus?

For the detection of phosphorus, the organic compound after fusion with ${\mathrm{Na}}_2{\mathrm{O}}_2$ is extracted with water, boiled with ${\mathrm{HNO}}_3$ and then ammonium molybdate added to it. A yellow precipitate is obtained which is due to formation of:

Discuss in brief the principle of estimation of phosphorus.

How carbon and hydrogen are detected in an organic compounds?

What happens wwhen an organic compound is heated with $\mathrm{CuO}$?

The colour of ammonium phosphomolybdate is : 

The acid used in the detection of phosphorus in an organic compound is : 

In the detection of carbon and hydrogen, hydrogen is oxidised to water(tested with anhydrous copper sulphate, which turns white.

Brief about the detection of Carbon and Hydrogen through qualitative anaysis.

In the detection of carbon and hydrogen(Qualitative analysis of organic compounds), Hydrogen is oxidised to water(tested with anhydrous copper sulphate, which turns_____).

In the detection of carbon and hydrogen, carbon present in the compound is oxidised to _____.

Carbon and hydrogen are detected by heating the compound with copper(II) oxide.

In Lassaigne’s test, on treating sodium fusion extract with sodium nitroprusside, the appearance of a _____ colour further indicates the presence of sulphur.

In Lassaigne’s test, _____ precipitate of lead sulphide indicates the presence of sulphur and lead. (black/white)

What happens if sodium thiocyanate reacts with the excess of sodium?Explain.

Why sodium thiocyanate doesn't give Prussian blue instead of red blood colour?

In Lassaigne’s test, nitrogen and sulphur both are present in an organic compound, sodium thiocyanate is formed.

The nitrogen oxide can be converted into molecular nitrogen.