Moreover, the salt (A) on heating with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) produces deep red vapors 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 teh aforesaid characteristic informations answer the following questions: Which of the following statements is incorrect?

Moreover, the salt (A) on heating with solid K_(2)Cr_(2)O_(7) and co

1.	Moreover, the salt (A) on heating with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) produces deep red vapors 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 teh aforesaid characteristic informations answer the following questions: Which of the following statements is incorrect?
Answer» The black precipitate D is of bismuth The black precipitate D is of `Hg+ Hg (NH_(2))NO_(3)` Aqueous solution of A gives yellow precipitate with freshly prepared `10%` solution of pyrogallol. Aqueous solution of A gives red precipitate with 8-hydroxyqunoline (5%) and POTASSIUM iodide (6M) in acidic medium. Solution : (d) `Bi^(3+)+C_(9)H_(7)ON +H^(+) +4I^(-) rarr C_(9)H_(7)ON.HBiI_(4)darr` (Red ppt.) (c) `Bi^(3+)+ C_(6)H_(3)(OH)_(3) rarr Bi(C_(6)H_(3)O_(3))darr +3H^(+)` (yellow ppt.)