Question

Define oxidation and reduction :
(a) On the basis of electronic concept
(b) On the basic of oxidation number.

Answer 1

(a) On the basic of electronic, oxidation may be defined as a reaction in which one or more electrons is lost by atom, ion or molecule.
The reduction may be defined as a reaction in which one or more electrons is gained by an atom, ion or molecule,

(b) On the basis of oxidation number, oxidation may be defined as a reaction in which the oxidation number of an element in an atom, molecule or ion increase. Reduction may be defined as a reaction in which the oxidation number of an element in an atom, ion or molecule decreases.