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Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-OC-RX-0011 markL1 FoundationCalculatorRedox definitions
Oxidation is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0021 markL1 FoundationCalculatorRedox definitions
In CuO+H2→Cu+H2O\mathrm{CuO+H_2\rightarrow Cu+H_2O}, the substance reduced is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0121 markL1 FoundationCalculatorRedox definitions
Reduction is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0031 markL2 StandardCalculatorRedox definitions
In Zn+Cu2+→Zn2++Cu\mathrm{Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu}, zinc is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0041 markL2 StandardCalculatorAgents
What is the oxidation number of sulfur in SO2\mathrm{SO_2}?

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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0052 marksL2 StandardCalculatorAgents
What is the oxidation number of manganese in KMnO4\mathrm{KMnO_4}?

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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0061 markL2 StandardCalculatorAgents
In Cl2+2Br−→2Cl−+Br2\mathrm{Cl_2+2Br^-\rightarrow 2Cl^-+Br_2}, the oxidising agent is
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0071 markL2 StandardCalculatorAgents
Acidified potassium manganate(VII) changes from purple to colourless when added to
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0081 markL2 StandardCalculatorAgents
Potassium iodide solution turns brown when added to
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0091 markL2 StandardCalculatorRedox definitions
The name iron(III) chloride tells you
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0101 markL2 StandardCalculatorRedox definitions
Which change is a reduction?
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-RX-0111 markL3 ExamCalculatorAgents
In Fe2O3+3CO→2Fe+3CO2\mathrm{Fe_2O_3+3CO\rightarrow2Fe+3CO_2}, the reducing agent and the change in iron's oxidation number are
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Salam Academy Original Practice · Proposed mark scheme