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A solution containing a group-IV cation gives a precipitate on passing, H_(2)S . A solution of this precipitate in dil. HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :

A solution containing a group-IV cation gives a precipitate on passing, H_(2)S . A solution of this precipitate in dil. HCl produces a white precipitate with NaOH solution and bluish-white prcipitate with basic potassium ferrocyanide. The cation is :

Why are the group IV cations not precipitated as sulphides on passing H_(2)S gas through group II solution?

An acidic solution contains both Zn^(2+) and Hg^(2+) ions. Which ion will get precipitated passing H_2S into it ?

Which of the following cation gives white precipitate with H_2S in alkaline medium ?

Is it necessary to acidify a solution before group II cations are precipitated with H_(2)S ?