Which colour precipitate is obtained when a solution of `Ca^(2+)` ions reacts with potassium ferrocyanide.

A red colouration or precipitate is not obtained when:

A red colouration or precipitate is not obtained when:

The colour of the precipitate obtained when an aqueous solution of sodium chloride is treated with silver nitrate solution is

Colour of precipitates obtained when cadmium chloride reacts with hydrogen sulphide.

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 :

The colour of the precipitate obtained when an aqueous solution sodium chloride is treated with silver nitrate solution is

A chocolate - brown precipitate is obtained when acetic acid and potassium ferrocyanide is added to an aqueous solution of -