Draw a neat and well-labelled diagram for electrolytic refining of copper.

Metals react with water to form their oxides or hydroxides. State the special name given to the metallic oxides which dissolve in water.

Explain the reactions of different metals with hot water, cold water and steam. Give one example with a proper balanced chemical equation. Name two metals which do not react with any form of water.

Given below are the steps for extraction of copper from its ore. Write the reaction involved.

a. Roasting of copper (I) Sulphide

b. Reducing of copper (I) oxide with copper (I) sulphide

c. Electrolytic refining

Give the steps involved in the extraction of metals of low and medium reactivity from their respective sulphide ores.