Question

Write any three examples.
C. Long Answer Questions.
1. What are pure substances? Write any three characteristics of pure substances.
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Answer 1

Answer:

Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure.

Three charateristics are:

• Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules.
• These substances mainly have a constant or uniform composition throughout.
• The substances have fixed boiling and melting points.

Explanation:

Hope it helps

Answer 2

Explanation:

Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules.

These substances mainly have a constant or uniform composition throughout.

The substances have fixed boiling and melting points.

A pure substance usually participates in a chemical reaction to form predictable products.

Examples of Pure Substances

All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances

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