Who this is for: Cambridge IGCSE Coordinated Science (0654) students who want types of oxides — acidic, basic, amphoteric and neutral — to become a reliable source of marks instead of a random examples list.
What query it owns: how to understand and revise types of oxides in Cambridge IGCSE Coordinated Science.
Why this is safe: this page owns the types-of-oxides revision-guide angle, while Tutopiya’s Types Of Oxides subtopic page owns the learning resource and the free Types Of Oxides quiz owns the practice.

Oxides are compounds of oxygen with another element. Cambridge IGCSE Coordinated Science (0654) classifies them as acidic, basic, amphoteric or neutral based on how they react with acids and bases. This guide links each type to characteristic reactions and examples examiners expect.

Key takeaways

• Acidic oxides (non-metal oxides) react with bases to form salt + water.
• Basic oxides (metal oxides) react with acids to form salt + water.
• Amphoteric oxides react with both acids and bases (e.g. Al₂O₃, ZnO).
• Neutral oxides do not react with acids or bases (e.g. CO, H₂O, N₂O).
• Acidic oxides often form acidic solutions when dissolved in water.

What are types of oxides in Cambridge IGCSE Coordinated Science?

When oxygen combines with another element, the resulting oxide’s behaviour depends on the other element’s nature. Non-metal oxides are typically acidic; metal oxides are typically basic. Some metal oxides show amphoteric behaviour, and a few oxides are neutral. Knowing the type helps predict reactions and salt formation.

You can read the full explanation, examples and notes on Tutopiya’s Types Of Oxides subtopic page before you attempt questions.

Classification table

Type	Typical elements	Reaction with acid	Reaction with base	Examples
Acidic	Non-metals	No reaction	Reacts (neutralisation)	CO₂, SO₂, NO₂
Basic	Metals (low/medium reactivity)	Reacts (neutralisation)	No reaction	CuO, Fe₂O₃, MgO
Amphoteric	Al, Zn, Pb	Reacts	Reacts	Al₂O₃, ZnO
Neutral	—	No reaction	No reaction	CO, H₂O, N₂O

Oxide reactions — what to expect

Oxide type + reactant	Products	Example
Acidic oxide + base	Salt + water	CO₂ + 2NaOH → Na₂CO₃ + H₂O
Basic oxide + acid	Salt + water	CuO + H₂SO₄ → CuSO₄ + H₂O
Amphoteric oxide + acid	Salt + water	Al₂O₃ + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂O
Amphoteric oxide + base	Salt + water	Al₂O₃ + 2NaOH → 2NaAlO₂ + H₂O

Types of oxides in past-paper wording

Command word	What the question wants	Typical stem
Classify	Name oxide type	”Classify sulfur dioxide as an oxide type.”
State	Example or property	”State one amphoteric oxide.”
Write equation	Oxide reaction	”Write an equation for copper(II) oxide and sulfuric acid.”
Explain	Why oxide behaves as it does	”Explain why CO₂ is an acidic oxide.”

Worked exam-style stems

1. “Classify aluminium oxide and state one property that justifies your answer.” Amphoteric — it reacts with both acids and bases. Reward: amphoteric + reacts with both.
2. “Write a word equation for the reaction of magnesium oxide with hydrochloric acid.” Magnesium oxide + hydrochloric acid → magnesium chloride + water. Reward: correct salt and water.
3. “State one neutral oxide.” Carbon monoxide (or water, nitrous oxide). Reward: any valid neutral oxide.

Test yourself with the Types Of Oxides quiz once you can classify oxides and predict reactions.

How types of oxides connect to the syllabus

Oxide classification links to acid-base properties, salt preparation and the periodic table (metals vs non-metals). Acidic oxides connect to air pollution (SO₂, NO₂). The Cambridge IGCSE Coordinated Science resource hub links every Acids, Bases And Salts subtopic.

Common mistakes students make

• Calling all metal oxides basic (Al₂O₃ and ZnO are amphoteric).
• Stating water is acidic or basic (it is neutral).
• Confusing acidic oxide with acid (CO₂ is an acidic oxide; it forms an acid in water).
• Forgetting CO is neutral, not acidic.
• Mixing up products when an acidic oxide reacts with an alkali (salt + water, not CO₂ again).

When you need more support

If oxide classification questions keep costing marks, work through the Types Of Oxides quiz, then get focused help from a Cambridge IGCSE Coordinated Science tutor.

Frequently asked questions

Is types of oxides hard in Coordinated Science? Four categories with clear reaction rules — learn examples for each type.

What is an amphoteric oxide? An oxide that reacts with both acids and bases, such as aluminium oxide or zinc oxide.

Why is carbon dioxide an acidic oxide? It reacts with bases to form salts and water, and forms carbonic acid in water.

How do I revise types of oxides effectively? Learn the four types with two examples each, practise equations, then take the quiz.

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