What is observed when excess of dilute NaOH solution added to an aqueous solution of aluminium chloride?A permanent white precipitate is formed immediatelyA green precipitate forms which turns red on standing in airA white precipitate which dissolves in e (2024)

If NaOH is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess NaOH, the precipitate dissolves. In this solution, zinc exists in the:

A solution contains a group IV cation. It's sulphide precipitate dissolves in dil. HCl on boiling. On addition of NaOH to the dissolved sulphide precipitate solution in excess, a white precipitate is formed which turns brown due to atmospheric oxidation.
The cation is:

If NaOH is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess NaOH, the precipitate dissolves. In this solution, zinc exists in the:

A coloured precipitate is obtained when H2S gas is passed through an aqueous solution of a salt in the presence of ammonium hydroxide. The precipitate dissolves in dilute HCl and reacts with NaOH to give white precipitate which on standing turns into a brown/black mass. The brown/black mass on fusion with KNO3 and Na2CO3 gives green mass. The cation of the salt is:

Identify the cations in each of the following cases :
(i) NaOH solution when added to the Solution (A) gives a reddish brown precipitate.
(ii) NH4OH Solution when added to the Solution (B) gives white precipitate which does not dissolve in excess.
(iii) NaOH Solution when added to Solution (C) gives white precipitate which is insoluble in excess.