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Is Matter Around Us Pure ? — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?2 Marks
Question
What is meant by a substance?
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Answer

A pure substance is the one that consists of a single type of particles, i.e., all constituent particles of the substance have the same chemical nature. Pure substances can be classified as elements or compounds.

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