Question

what do you understand by term
1)Pure substances
2)Mixtures
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Answer 1

Explanation:

1. Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. Pure substances are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom.
2. a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

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Answer 2

1. Pure substances can either be one single element or one single compound, but every sample of the substance that you examine must contain exactly the same thing with a fixed, definite set of properties.
2. Mixture contains two or more elements or compounds mixed together. There are two types of mixture:-

• Homogeneous mixture- The mixture which completely soluble and can't be reversed.
• Heterogeneous mixture- The mixture which is not completely soluble and can be reversed.