Define the following in terms of gain or loss of hydrogen with one example each:

(i) oxidation (ii) reduction

(a) H2S + Cl2 S + 2HCl

(i) In the reaction hydrogen is removed from H2S.So, by definition removal of hydrogen is called oxidation, so, hydrogen sulphide is oxidized.


(ii) Hydrogen is being added to Chlorine, so, Chlorine is reduced to hydrogen chloride.


35