Question

Which of the following statement (s) is/are true ? 

(A) Ag⁺ ions do not give white precipitate with concentrated HCl 

(B) Cu²⁺ ions produce a white precipitate when KCN solution is added in a small quantity 

(C) Hg²⁺ ions give deep blue precipitate with cobalt acetate and ammonium thiocyanate

(D) Black precipitate of BiI₃ turns orange when heated with water 

Answer 1

All the options (A), (B), (C), (D) are correct.