GCSE Chemistry: Reactivity of Metals

The reactivity series is one of the most useful predictive tools in GCSE Chemistry: a single ordered list that determines which reactions happen, which extraction methods work, and which metals survive in the ground unreacted. This quiz tests whether you can actually wield it.

Displacement reactions run through the set in every direction the exam uses: zinc dropped into copper(II) sulfate solution and the observations that follow, predicting which metal pairs will and will not displace each other, and the null case — copper added to magnesium sulfate, where nothing happens because the added metal is less reactive. Each question states the reactivity order it needs, so the reasoning is tested rather than pure recall.

Extraction chemistry forms the second thread: which metals can be pulled from their ores by heating with carbon (those below carbon in the series, like iron and zinc), which cannot (those above it, like calcium and potassium — they need electrolysis), why potassium is the hardest metal in the list to extract, and why gold needs no extraction at all, being unreactive enough to occur native.

Oxidation and reduction are handled at exactly GCSE depth — gain and loss of oxygen. The copper(II) oxide plus carbon reaction asks which substance is reduced; the iron extraction reaction flips the perspective and asks what happens to the carbon, establishing that the reducing agent is itself oxidised. A statement-selection question locks in the definitions.

Explanations consistently tie each answer back to relative positions in the series, building the one-sentence justification pattern ("X is more reactive than Y, so...") that exam mark schemes explicitly credit.

• Use the reactivity series to predict displacement reactions, including when no reaction occurs
• Describe the observations in metal displacement experiments
• Determine which metals can be extracted by reduction with carbon and which need electrolysis
• Explain why gold occurs native and why very reactive metals are hardest to extract
• Define oxidation and reduction as gain and loss of oxygen, and identify each in real reactions

Topic scope follows the Department for Education's GCSE combined science subject content, chemical changes strand: the reactivity series, displacement reactions, extraction of metals by reduction, and oxidation and reduction in terms of oxygen.