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Electron Transfer Reactions · Paper 1 — Free Chemistry SL Practice Questions

1FoundationMCQRedox reactions and electron transfer1 markPaper 1~2 min
In the reaction Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)\text{Zn}(s) + 2\text{HCl}(aq) \rightarrow \text{ZnCl}_2(aq) + \text{H}_2(g), what is the change in oxidation state of zinc, and what role does zinc play in this reaction?
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2FoundationMCQRedox reactions and electron transfer1 markPaper 1~2 min
In the reaction 2Mg(s)+O2(g)→2MgO(s)2\text{Mg}(s) + \text{O}_2(g) \rightarrow 2\text{MgO}(s), a student claims: "Magnesium is reduced because it gains oxygen." Which statement correctly evaluates this claim?
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3FoundationMCQRedox reactions and electron transfer1 markPaper 1~2 min
During the electrolysis of molten sodium chloride, which statement correctly describes the reaction occurring at the cathode?
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4MasteryMCQRedox reactions and electron transfer1 markPaper 1~2 min
In the blast furnace extraction of iron, the following reaction occurs: Fe2O3(s)+3CO(g)→2Fe(l)+3CO2(g)\text{Fe}_2\text{O}_3\text{(s)} + 3\text{CO(g)} \rightarrow 2\text{Fe(l)} + 3\text{CO}_2\text{(g)} Which statement correctly describes the change in oxidation state of carbon in this reaction, and the role of CO?
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