When sulphur is boiled is boiled with `Na_2 SO_3`, a compound `(X)` is produced, `(X)` with excess of `AgNO_3` solution gives a compound `(Y)` which is soluble in water and produces a black coloured sulphide `(Z)`. Identify compounds `(X),(Y)` and `(Z)`.

When sulphur is boiled with Na_(2)SO_(3) solution, the compound formed is

When sulphur is boiled with Na_(2)SO_(3) solution, the compound formed is :

When sulphur is boiled with Na_(2)SO_(4) solution, the compound formed is :

A red coloured mixed oxide (X) on treatment with conc. HNO_(3) gives a compound (Y). (Y) with HCl produces a chloride (Z) which is insoluble in cold water but soluble in hot water, (Z) can also be formed by treating (X) with conc. HCl. Compounds (X), (Y) and (Z) are :

A scarlet red compound (X) on treatment with conc. HNO_(3) gives compounds (Y) and (Z). (Z) with HCL produces a chloride compond (A) which can also be produced by treating (X) with conc HCL. Compounds (X), (Z) and (A) will be