Question

what is an oxidation reaction?is it exothermic or endothermic?give one example of oxidation reaction ​

Answer 1

Answer:

a reaction in which addition of oxygen,removal of hydrogen,increase in positive charge or increase in oxidation number is called as oxidation.

we cannot determine whether it is exothermic or endothermic.

ex: 2Mg+O2-->2MgO

Answer 2

Answer:

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High level answer:

Oxidation is defined as the interaction between oxygen molecules and all the different substances they may contact, from metal to living tissue. Technically, however, with the discovery of electrons, oxidation came to be more precisely defined as the loss of at least one electron when two or more substances interact. Those substances may or may not include oxygen. (Incidentally, the opposite of oxidation is reduction — the addition of at least one electron when substances come into contact with each other.) Sometimes oxidation is not such a bad thing, as in the formation of super-durable anodized aluminum.

medium level answer: oxidation is a process in which substance oxidize.

(i.e,1.gain of oxygen

2.loss of hydrogen

3.gain of electropositive element(element having tendency to remove electron,metal)

4.removal of electronegative element(non metal)

5.loss of electron)

ex,

(see fig.)

we cannot define it is endothermic or exothermic but can be define when heat is relese or absorb during reaction which is also oxidation like in case of zinc metal to loss electron we heat.

thats why it is endo thermic reaction (absorb heat)

there are many examples.