In which of the following reactions, the underlined substance has been oxidised?

Options

A. `Br_(2) + H_(2)S to 2HBr + S`
B. `2HgCl + SnCl_(2) to Hg_(2)Cl_(2) + SnCl_(4)`
C. `Cl_(2) + 2Kl to 2KCl + I_(2)`
D. `2Cu^(2+) + 4I^(-) to Cu_(2)I_(2) + I_(2)`

Answer

C

Explanation

Oxidation is the addition of electronegative element or removal of electropositive element or increase in oxidation number.
`Cl_(2) + 2Kl to 2KCl + I_(2)`
In this reaction, the underline species is oxidsied, as it involve the removal of electropositve element, i.e. `K^(+)`