During the halogen test,the sodium fusion extract is boiled with concentrated $HNO_3$ to ... .

How is the silver halide obtained from an organic compound distinguished?

The presence of halogen in an organic compound is detected by:

Given below are two statements :
Statement $I$ : In Lassaigne's Test,when both nitrogen and sulphur are present in an organic compound,sodium thiocyanate is formed.
Statement $II$ : If both nitrogen and sulphur are present in an organic compound,then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give $NaCN$ and $Na_{2}S$.
In the light of the above statements,choose the most appropriate answer from the options given below.

Sodium fusion extract of aniline,when heated with ferrous sulphate solution and then acidified with concentrated $H_2SO_4$,forms which of the following complexes?

The blue color obtained in the Lassaigne's test is due to the formation of which compound?