Question

What is oxidation give a example

Answer 1

Addition of oxygen to a substance or removal of hydrogen is known as Oxidation.
ex:- CuO+H2= Cu+H2O.

Here, hydrogen is oxidised...
note that Oxidation and reduction takes place simultaneously ..

Answer 2

the addition of oxygen to a substance is called oxidation.
or

the removal hydrogen from a substance is called oxidation.

for example.

copper oxide + hydrogen +heat---------copper + water