Chlorine

(i) When chlorine oxidises sulphur dioxide in presence of water, it gives as oxyacid . The reaction occurs as follows:



The oxidation number of sulphur in is



or, where oxidation state of sulphur .



Hence, oxidation state of (S) in is .

(ii) When chlorine oxidises iodine in presence of water, it gives as oxyacid , the reaction occurs as follows:



The oxidation state of (I) in is :

Let oxidation state of



Hence, oxidation state of iodine (I) in is