Question

what are oxygen and reducing agents how to find an oxygen and reducing agents in an chemical reaction

Answer 1

Oxidizing agent is the substance having atoms or molecules of oxygen.
Reducing agent is the substance which reduces given substance to simpler form from its oxides.

Answer 2

oxydizing agent -- a reagent which can increse the oxidation no. of an element in a given substance,

reducing agent -- a reagent which decreases the oxidation no. of an element in a given substance.