Question

What is a pure substance and a mixture?

Answer 1

Pure substances:

• "Pure substances can be elements or compounds. An element is a form of matter that cannot be broken down by chemical reactions into simpler substances. A compound is a substance composed of two or more different types of elements, chemically combined in a fixed proportion.
• Examples of pure substances are Iron, Sodium, etc.

Mixtures:

• A mixture contains more than one substance (element and/or compound) mixed in any proportion.
• Mixtures can be separated into pure substances using appropriate separation techniques.
• Examples of mixtures are Muddy water, sugar solution, etc.