TNPSC CCSE 4 Exam Chemistry Study Materials

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TNPSC CCSE 4 Exam Chemistry Study Materials

TNPSC CCSE 4 Exam Chemistry Study Materials

In retrospect, the definition of chemistry has changed over time, as new discoveries and theories add to the functionality of the science. The term “chymistry”, in the view of noted scientist Robert Boyle in 1661, meant the subject of the material principles of mixed bodies. In 1663 the chemist Christopher Glaser described “chymistry” as a scientific art, by which one learns to dissolve bodies, and draw from them the different substances on their composition, and how to unite them again, and exalt them to a higher perfection. The 1730 definition of the word “chemistry”, as used by Georg Ernst Stahl, meant the art of resolving mixed, compound, or aggregate bodies into their principles; and of composing such bodies from those principles.

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