Tin dissolves in excess of sodium hydroxide solution to form _____________ .

A white solid P, on strong heating, decomposes to give reddish brown gas R and a residue Q. The residue R is yellow when hot and white when cold. The solution of white solid P in water gives white precipitate S, with concentrated sodium hydroxide. The white precipitate S dissolves in excess of sodium hydroxide solution to form colourless solution. Another sample of the solid P in water is mixed with ferrous sulphate solution and then to this solution are added a few drops of conc. sulphuric acid. A brown ring is formed at the junction of liquids. Answer the following questions: Name the salt formed when S dissolves in excess of sodium hydroxide.

Excess of sodium hydroxide reacts with zinc to form

Excess of sodium hydroxide reacts with zinc to form

Excess of sodium hydroxide reacts with zinc to form

Excess of sodium hydroxide reacts with zinc to form

Sulfur dioxide reacts with sodium hydroxide solution to form ____

The hydroxide of which metal ion is soluble in excess of sodium hydroxide solution:

A black solid P dissolves in warm and dilute HCI to form greenish yellow solution Q, but does not give off any gas. The solution Q on treating with ammonium hydroxide forms bluish white precipitates of R. The precipitates of R dissolve in excess of ammonium hydroxide. solution to form deep-blue colouration. Identify solid P and bluish white precipitates of R. Write equations for action of excess of ammonium hydroxide on R.

Horn silver ore dissolves in excess of sodium cyanide solution forming