difference between pure and impure substance
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Complete step by step answer:
(a) Pure and impure substance
Pure substances:
(i) Pure substances possess specific composition and their physical properties and the chemical properties also remain the same.
(ii) Pure substance has sharp melting and boiling point.
(iii) Pure substances are homogeneous in nature which means their composition remains the same throughout the bulk.
(iv) Examples of pure substances are elements and compounds.
Impure substances:
(i) The composition of the impure substance is not fixed. The impure substance is formed of two or more than two pure substances.
(ii) The temperature of impure substances has a range at which they melt or boil.
(ii) Impure substances may be homogeneous in nature or heterogenous in nature which means its composition changes.
(iii) Examples of impure substances are air, petroleum, sugar solution in water.
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