During the detection of phosphorus in an organic compound,a yellow precipitate is formed due to the formation of:

In Lassaigne's extract of an organic compound,both nitrogen and sulphur are present,which gives blood red colour with $Fe^{3+}$ due to the formation of-

In the Lassaigne's test for the detection of sulfur,which substance is responsible for the formation of black precipitates?

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$-$

Which of the following methods is used to check the purity of an organic compound?

For testing halogens in an organic compound with $AgNO_{3}$ solution,sodium extract (Lassaigne's test) is acidified with dilute $HNO_{3}$. What will happen if a student acidifies the extract with dilute $H_{2}SO_{4}$ in place of dilute $HNO_{3}$?