Chapter 7: Acids, Bases and Salts — Part 2

01 Classification of Oxides

Metal and non-metal oxides are classified based on their reaction with acids and bases.

• Basic Oxides: Formed when metals react with oxygen (e.g., CuO, CaO). They react with acids to form a salt and water.
• Acidic Oxides: Formed when non-metals react with oxygen (e.g., SO₂, CO₂).
• Amphoteric Oxides: These are oxides that can react with both acids and bases to produce a salt and water.
  • The syllabus requires you to classify aluminium oxide (Al₂O₃) and zinc oxide (ZnO) as amphoteric.