Explain About Oxidation and Reduction.Also Differentiate between them.Give Some reactions..How to identify which reactant is getting oxidised and which is getting reduced.Please give a clue about how to do the above stuff ???

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Solution

Oxidation is loss of electrons. reduction is gain of electrons.

when there is an increase in oxidation we call that process as oxidation. decrease in oxidation number is reduction. for example
Zn + Cu2+ ====> Zn2+ +Cu
free elements the oxidation number is 0.
Here we see Zn 0 becoming Zn 2+ . an increase in oxidation number from 0 to 2+ we see Hence Zn is said to be oxidised.
Cu2+ to Cu 0 we see a decrease in oxidation number from 2+ to 0 so Cu2+ is getting reduced here.
in terms of electrons the equations will be Zn ===>Zn2+ +2e-
and Cu2+ +2e-===>Cu

usually electrons on the right side can be termed as loss of electrons and oxidation. electrons on the left side means gain and called as reduction.

Note:please learn the rules to find the oxidation number of elements

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