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?

Which of the following nitrogen-containing compounds does not give Lassaigne's test?

In the preparation of sodium fusion extract,the purpose of fusing organic compound with a piece of sodium metal is to

Match column $-I$ and column $-II$ with the correct relation:

Column $-I$	Column $-II$
$(i).$ Lassaigne's test	$(a).$ By sodium peroxide
$(ii).$ Test for nitrogen	$(b).$ Acidify with acetic acid
$(iii).$ Test for sulphur	$(c).$ Acidify with conc. sulphuric acid
$(iv).$ Test for phosphorus	$(d).$ Fusion with sodium

When sodium fusion extract of an organic compound is boiled with iron$(II)$ sulphate solution followed by addition of concentrated $H_2SO_4$,it gives a Prussian blue colour. This confirms the presence of which element?

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.