Write scientific reason.

Sodium is always kept in kerosene.

Write scientific reason.

Pine oil is used in froth flotation.

Write scientific reason.

Anodes need to be replaced from time to time during the electrolysis of alumina.

When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.

The electronic configuration of metal ‘A’ is 2,8,1 and that of metal ‘B’ is 2,8,2. Which of the two metals is more reactive? Write their reaction with dilute hydrochloric acid.

Draw a neat labelled diagram.

Magnetic separation method.

Draw a neat labelled diagram.

Froth floatation method.

Draw a neat labelled diagram.

Electrolytic reduction of alumina.

Draw a neat labelled diagram.

Hydraulic separation method.