Give briefly the isolation of magnesium from sea water by the Dow process. Give equations for the steps involved.

Give reasons of the following:
Hydrogen peroxide acts as an oxidising as well as a reducing agent.

Write down the balanced equation for the reaction when:
Carbon dioxide is passed through a suspension of lime stone in water.

Write down the balanced equation for the reaction when:
Potassium ferricyanide reacts with hydrogen peroxide in basic solution