Write the principles involved in the estimation of (i) Halogens (ii) Sulphur present in an organic compound.

Write the principles involved in the estimation of (i) Halogens (ii) S

1.	Write the principles involved in the estimation of (i) Halogens (ii) Sulphur present in an organic compound.
Answer» Solution :(i) Halongens: HALOGENS reacts with silver nitrate to for precipitate of silver halides. `X+Ag^(+)toAgX` X REPRESENTS a halogen -Cl-Br or -I (ii)) Sulphur `S^(+)[Fe(CN)_(5)NO]^(2)to[Fe(CN)_(5)NOS]^(4-)` Sulphur reacts with notropresside to from a violet COLOUR complex.