Which identifies an oxidation-reduction reaction? a double replacement reaction a neutralization reaction a reaction in which oxidation numbers change a reaction in which no electrons are transferred

a reaction in which oxidation numbers change


Explanation:

1) A reaction where electrons are transferred from one atom to other is called oxidation - reduction reaction.

2) In such a reaction one (or more) kind of atoms lose electrons and other (or others) gain such electrons.

3) The atoms that lose electrons increase their oxidation state (they increase their positive charge), and the atoms that gain electrons reduce their oxidation state (they reduce their oxidation state).

So, in an oxidation - reduction reaction the oxidation numbers change (some increase and some reduce).

The element whose oxidation state increase is named reducing agent and the element whose oxidation number is reduced is the oxidizing agent.