Any chemical may be pure or impure.
A chemical analysis is needed.
Chemical materials (pure or impure) can be pollutants for waters, soils and air.
An inpure chemical boil over a range of temperature. While, a pure solution melt at a fixed temperature.
pure
Sulphur can be pure or impure depending on it's source.For that matter no substance can be classified as pure or impure just by it's name.It depends on what chemists call ASSAY.Whenever you buy a chemical ask for ASSAY,you will know it's purity.Sometimes , even if the purity is not 100%,the chemical can be used if the impurity does not affect the product.Even the so called pure metals will have some amount of impurity
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impure
No, impure chemicals do not melt at the same temperature as pure chemicals. Impurities can disrupt the crystal lattice structure of a substance, causing the melting point to decrease or broaden. This results in impure substances melting at lower temperatures compared to their pure counterparts.
Pure water does not contain colour but impure water contains Other compounds.
Generally an impure material is cheaper than a pure material; the word advantage is not so adequate here - can use pure or impure, this depends on the specific applications.
The suitable prefix for pure is pure it won't make sense of you put another set of words in front of pure it just would not make
impure