Qualitative Elemental Analysis of Organic Compounds

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

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:

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(Qualitative analysis of organic compounds), Hydrogen is oxidised to water(tested with anhydrous copper sulphate, which turns_____).

What is the colour formed during the detection of sulphur qualitatively?

How does sulphur detected qualitatively?

How does nitrogen detected qualitatively?

What is the colour of the precipitate we can observe in the reaction between chloride ion with ${\mathrm{AgNO}}_3$ solution ?

In Lassaigne sodium fusion test, $\mathrm{N}$ and $\mathrm{S}$ of an organic compound are converted into $\_\_\_\_\_\_\_\_$

Detection of sulphur in Lassaigne's test is not done by which of the following reagents?

Which reagent is used for the detection of sulphur?

Give the reactions involved in the lassaigne's test for the detection of sulphur.

Which of the following is the chemical formula of ammonium phosphomolybdate ?

Write the reaction involved in the conversion of phosphorous in the compound to phosphate?

Write an equation for the reaction of phosphate ion with ammonium molybdate.

An organic compound on heating with $\mathrm{CuO}$ produces ${\mathrm{CO}}_2$ but not water. The organic compound may be

The Lassaigne's solution when heated with ferrous sulphate and acidified with sulphuric acid gives an intense blue colour indicating the presence of nitrogen. The blue colour is due to the formation of

The oxidation states of the iron atoms in prussain blue coloured complex formed during the test for the presence of nitrogen in an organic compound are