Question

define tetravalency, oxidation.. with example

Answer 1

In chemistry,tetravalency is the state of atom with 4 valence electrons,available for covalent chemical bonding.

e.g. CH4 methane

in methane ,tetravalent carbon ..make bond with 4 oxygen atoms.

oxidation - in general form ,loss of electron is oxidation.

Hope bthis will help.

Answer 2

if an element shows + 4 valency is said to be tetravalent and this phenomena is said to be tetravalency.
for example carbon shows the valency of + 4 in CH4

the removal of hydrogen and loss of electron and addition of oxygen atom is said to be oxidation.
an Oxidation state is may be defined as the number of charge present on a particular atom when all the charges are present on it are removed.