Question

Why can metals high up in the reactivity series not be obtained by reduction of their oxides by carbon ?

The metals produced by various reduction processes are not very pure. They contain impurities, which must be removed to obtain pure metals. The most widely used method for refining impure metals is electrolytic refining.

Name the chemical reaction that occurs between iron (III) oxide and aluminium metal. Write its balanced chemical equation. Why is this reaction called displacement reaction ? Give one use of this reaction.

A student is working in a laboratory with metal 'E' which is stored under kerosene oil. Some how a small piece of this metal falls in a beaker containing water and starts burning.

Draw a labelled diagram to show electrolytic refining of copper. State what happens when electric current is passed through the electrolyte taken in this case.