Analytical Test...

In the analysis of basic radicals, NH₄OH and NH₄Cl give precipitate with

Out of Cu²⁺ , Ni²⁺ , CO²⁺ and Mn²⁺, which is dissolved when H₂S is passed through it in the presence of dil. HCl ?

The only cations present in a slightly acidic solution are Fe³⁺ , Zn²⁺ and Cu²⁺ . The reagent that when added in excess to this solution would identify and separate Fe³⁺ in one step is

The dark blue colour of the solution formed when excess of ammonia is added to a solution of copper (II) sulphate is due to the presence of the ion

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

Prussian blue is obtained by mixing together aqueous solution of Fe³⁺ salt with

A solution when diluted with H₂O and boiled, it gives a white precipitate. On addition of excess NH₄Cl/NH₄OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH₄OH/NH₄Cl.

CuSO₄ decolourises on addition of KCN, the product is

Copper sulphate solution, when added to an excess of ammonium hydroxide, forms a complex compound due to

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is