The conversion of ferrous sulphate to ferric sulphate is `………..` reaction.

Explanation

When ferric ion is formed from ferrous ion, the positive charge is increased by one unit. While this happens the ferrous ion loses one electron. A process in which a metal or its ion loses one more electrons is called an oxidation.
`2FeSO_(4)rarrFe_(2)(SO_(4))_(3)`
`Fe^(2)+SO_(4)^(2)rarr2Fe^(3+)+3SO_(4)^(2-)`
Net reaction :
`underset("Ferrous")(Fe^(2+))rarrunderset("Ferric")(Fe^(3+))+e^(-)`