(a). An ore (A) on roasting with sodium carbonate and lime in the presence of air gives two
Channel: Doubtnut
Date: 2020-07-26

(a). An ore (A) on roasting with sodium carbonate and lime in the presence of air gives two compounds (B) and (C).  (b). The solution of (B) in conc. HCl on treatment with potassiu ferroyanide gives a blue colour or precipitate of compound (D).