define mixture(impure substances)
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A substance, on the other hand, is impure if it consists of different kinds of elements combined together physically and not chemically. Impure substances are also called mixtures. ... This mixture contains two or more chemical substances.
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mixture is consist of two or more substance in a variable ratio or not in fixed proportion.Impure substance are also called mixture. they are physically bound but not chemically bound. we can separate them by any physical process like handpicking, threshing etc.
There are two type of mixture
1. homogeneous.
2.heterogeneous
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