In organic compounds,nitrogen is tested in Lassaigne's test as:

Identify the binary mixture$(s)$ that can be separated into individual compounds by differential extraction,as shown in the given scheme.
$(A)$ $C_6H_5OH$ and $C_6H_5COOH$
$(B)$ $C_6H_5COOH$ and $C_6H_5CH_2OH$
$(C)$ $C_6H_5CH_2OH$ and $C_6H_5OH$
$(D)$ $C_6H_5CH_2OH$ and $C_6H_5CH_2COOH$

Consider the following table$-$

Column-$I$	Column-$II$
$A$. Best and latest technique for isolation,purification and separation of organic compounds	$i$. Chromatography
$B$. In Lassaigne's test for $N$	$ii$. Vacuum distillation
$C$. In Lassaigne's test for $S$	$iii$. Violet coloured complex is formed
$D$. Aniline is separated from water by	$iv$. Prussian blue coloured complex is formed
$E$. Glycerol is purified from spent lye	$v$. Steam distillation

The correct match is$-$

Give the answers for the Lassaigne test:
$(i)$ If nitrogen and sulphur are both present,what observation is observed?
$(ii)$ If bromine is present,what is the observation?
$(iii)$ In the Lassaigne extract,if black precipitates are not obtained upon adding $CH_3COOH$ and lead acetate,what does this indicate?
$(iv)$ What is the reason for adding $FeSO_4$ to the Lassaigne extract?
$(v)$ Why is the Prussian blue colour observed?
$(vi)$ What does the violet colour with sodium nitroprusside in the Lassaigne extract indicate?

In the detection of carbon and hydrogen,the organic compound is heated with which of the following?

In the test for halogens,why is nitric acid added to the sodium fusion extract before adding silver nitrate?