Question

define Redox reaction ​

Answer 1

$\sf\blue\bigstar$Redox is a type of chemical reaction in which the oxidation states of atoms are changed.

$\sf\blue\bigstar$Redox reactions are characterized by the actual or formal transfer of electrons between chemical species, most often with one species undergoing oxidation while another species undergoes reduction.

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Answer 2

The reactions in which oxidation and reduction reactions occur simultaneously are called redox reactions. The redox reactions are electron transfer reactions.

For example, consider the following redox reaction.

Zn+Cu 2→Zn 2 +Cu

Zn atom loses two electrons. Hence, it is oxidised to Zn(II) ions.

Cu(II) ion gain two electrons. Hence, it is reduced to Cu atom.