Question

2. Define the following with an example for each:

(a) Pure Substance

Answer 1

Part 1: Pure Substances

• Pure substances are substances that are made up of only one kind of particle and have a fixed or constant structure.
• Pure substances are mostly homogeneous in nature containing only one type of atom or molecule.
• These substances mainly have a constant or uniform composition throughout.

Part 2: Examples of Pure Substances

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