Tips and Tricks on Chemical Reactions and Equations


Oxidation number of an atom in element or gaseous state is zero.

Oxidation number of hydrogen is always +1 (except in ionic hydrides, where O.N. of hydrogen is -1)

Oxidation number of alkali metals is always +1 and that of alkaline earth metals is always +2

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Practice other most important chapters tips
Matter in Our Surroundings
Is Matter Around Us Pure?
Atoms and Molecules
Structure of Atom
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