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Inorganic chemistry deals with substances obtained directly or indirectly from minerals, ores and similar sources.

Organic chemistry deals with substances which are composed in part of carbon, and many of which are associated in some ways with living bodies, plants and animals.

Physical chemistry is concerned with those parts of chemistry which are closely linked with physics. Physical chemistry includes many of the principles of physics as well as those of chemistry. The knowledge of this division of the science is particularly important in all fields of chemistry. Since its fundamental laws are the basis all the different divisions are established upon.