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Answer:
1. A pure substance is defined as a substance that is consists of only one chemical and free from any contamination. For example: honey.
2. Properties of pure substance: homogeneous in nature, fixed boiling and melting points, and uniform composition.
3. Appearance - constant or uniform
Melting Point - Fixed throughout the sample
Boiling Point - Fixed throughout the sample
Pure substance refers to a substance that has a fixed chemical composition. For example, water, air, and nitrogen. Properties of pure substance are the following:
- Pure substances are mostly homogeneous in nature means it contains or made up of only one type of atoms or molecules.
- Pure substances have a constant or uniform composition throughout its structure.
- These substances have same appearance throughout its structure.
- These substances have fixed boiling and melting points.
So we can conclude that pure substance has fixed chemical composition throughout its body.
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