a) What is oxidation ? Give example to oxidization.
b) What is reduction ? Give example to reduction.

Explanation

1) Oxidation reaction : Oxidation is a reaction that involves the addition of oxygen or loss of hydrogen or electrons.
Examples : `Cu_((s))+O_(2(g))overset("Heat")rarr 2CuO_((s))`
`underset("(sodium)")(Na)-1e^(-) rarr underset("(sodium ion)")(Na^(+))`
2. Reduction reaction : The process in which a substance loses oxygen or gains hydrogen or electrons is known as reduction.
Examples : `CuO_((s))+H_(2(g))overset("Heat")rarr Cu_((s))+H_(2)O_((g))`
`underset("(chlorine)")(Cl)+l e^(-) rarr underset("(chloride ion)")(Cl^(-))`