Moreover, the salt 'A' on heating with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) produces deep red vapours which dissolve in sodium hydroxide solution forming a yellow solution. This yellow solution gives yellow precipitate with Ba((NO)_(3))_(2) solution. On the basis of the aforesaid characteristic informations answer the following question : Reaction involved in comprehension : 2Bi^(3+) (A)+3H_(2)S overset(H+) to Bi_(2)S_(3) darr ("black") (B) + 6H^(+) Bi_(2)S_(3)+8HNO_(3) to 2Bi (NO_(3))_(3) (C) +2NO +3S +4H_(2)O Bi^(3+) + 3OH^(-) overset(NaOH) to Bi(OH)_(3) darr ("white"), 2Bi(OH)_(3) ("white")+3[Sn(OH)_(4)]^(2-) to 2Bi darr (D) +3 [Sn(OH)_(6)]^(2-) Bi^(3+) + 3OH^(-) overset(Na_(4)OH) to Bi(OH)_(3) darr ("white"), Bi(OH)_(3)daar ("white")+3HCl to BiCl_(3)+3H_(2)O BiCl_(3)+H_(2)OtoBiOCl darr ("bismuth oxychloride") (E)+2HCl 4NaCl + K_(2)Cr_(2)O_(7)+3H_(2)SO_(4) ("conc.") to 2CrO_(2) Cl_(2) ("deep red vapours") + 2Na_(2)SO_(4)+K_(2)SO_(4)+3H_(2)O CrO_(2)Cl_(2) + 4OH^(-) to CrO_(4)^(2-) + 2Cl^(-) + 2H_(2)O CrO_(4)^(2-) +BaCrO_(4) darr (yellow) Acidified solution of 'A' on treatment with Kl gives black precipitate 'F' which dissolves in excess of reagent forming the coloured compound 'G'.The chemical composition of 'F' and 'G' are respectively: