O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2010 · Q161 Mark
Which reaction does not involve either oxidation or reduction?
ACH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
BCu2+(aq) + Zn(s) → Cu(s) + Zn2+(aq)
CCuO(s) + H2SO4(aq) → CuSO4(aq) + H2O(l)
DZn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)
✓ Correct answer
C: CuO(s) + H2SO4(aq) → CuSO4(aq) + H2O(l)
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