O-LevelChemistryStoichiometry5070/12 · May/June 2023 · Q281 Mark

Which equation is correct?

ACu(s) + O2(g) → 2CuO(s)

BMg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)

CNa(s) + H2O(l) → NaO(aq) + H2(g)

D2Zn(s) + 2HNO3(aq) → 2ZnNO3(aq) + H2(g)

✓ Correct answer

B: Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 28.

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