Calculate the oxidation number of Cl in
(i) `HClO_(4)`
(ii) `ClF_(3)`

Explanation

(i) let the oxidation number Cl be x.
`{:(+1" "x-2,,),(HClO_(4),,),(1 + x -2 xx 4 = 0,,),(1 + x - 8 = 0,x,=+7):}`
(ii) Let the oxidation number of Cl be x.
`{:(x" "-1,),(ClF_(3),),(x - 3 = 0,x = +3):}`