Question

When a substance is said to be pure ?

Answer 1

pure substance consists of only one type of substance not mixed with others. In contrast, a mixture is a substance which has two or more different substances mixed together (not chemically combined). In this chapter, we would look into how to differentiate if a substance is pure (or is it a mixture). Determining if a substance is pure is important because, for example, if a medication consists of impurities, it may cause harm when ingested.
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Answer 2

Answer: Any substance is said to be pure if and only if it is made up of single type of particles means all the particles of that substance should be of same chemical nature. For example water, sugar, salt, Sodium, Tin etc. There are two types of pure substances that are Elements and Compounds.

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