A compound (A) is greenish crystalline salt, which gave the following reactions. (i)Addition of BaCl_(2) solution to the solution of (A) results in the formation of white precipitate (B) which is insoluble in dilute HCl. (ii)On heating (A), water vapours and two oxides of sulphur (C ) and (D)are liberated leaving a red brown residue (E). (iii)(E) dissolves in warm concentrated HCl to give a yellow solution (F). (iv)Solution (F) on treatment with thiocyanate ions gives blood red coloured compound (G). Identify the compounds from (A) to (G).

A compound (A) is greenish crystalline salt, which gave the following

1.	A compound (A) is greenish crystalline salt, which gave the following reactions. (i)Addition of BaCl_(2) solution to the solution of (A) results in the formation of white precipitate (B) which is insoluble in dilute HCl. (ii)On heating (A), water vapours and two oxides of sulphur (C ) and (D)are liberated leaving a red brown residue (E). (iii)(E) dissolves in warm concentrated HCl to give a yellow solution (F). (iv)Solution (F) on treatment with thiocyanate ions gives blood red coloured compound (G). Identify the compounds from (A) to (G).
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