wat r v suppose 2 follow while identifing which element is gettin oxidised or reduced- the electropositivity orelectronegetivity /addition and reduction of oxygen or hydrogen

Oxidation is a process f in which an element losses one oe more electrons.

Reducction is a process in which an element gains one or more electrons.

both processes go on simultaneously in a chemical reaction.

 

Zn(s)  +  CuSO₄(aq) ------------->  ZnSO₄ (aq) + Cu (s)

here Zn -------> Zn²⁺ +2e^-

2 electrons are lost by zinc atom which then combines with sulphate ion.        Cu²⁺ + 2e^- ----------> Cu

copper ion gains two electrons and becomes neutral.