Write the reaction of formation of ${\mathrm{Fe}}^{2+}$ by reduction ${\mathrm{Fe}}^{3+}$ by making use of the symbol (${\mathrm{e}}^{-}$ ).

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

To prevent rusting, a layer of ______ metal is applied on iron sheets.

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

The conversion of ferrous sulphate to ferric sulphate is ______ reaction.

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

When electric current is passed through acidulated water ______ of water takes place.

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

Addition of an aqueous solution of ${\mathrm{ZnSO}}_4$ to an aqueous solution of ${\mathrm{BaCl}}_2$ is an example of ______ reaction.

What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.

How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?