CIE iGCSE Co-Ordinated Science C6.3 Redox Exam Style Questions Paper 2
Question
Solid zinc reacts with aqueous copper(II) sulfate. The ionic equation for the reaction is shown.
Zn + Cu2+ → Zn2+ + Cu
Which row identifies the substance being oxidised and the reducing agent?
▶️Answer/Explanation
Ans: D
Question
In which equation is the underlined substance acting as an oxidising agent?
(A) AgNO3 + NaCl → AgCl + NaNO3
(B) Cl2 + 2KBr → Br2 + 2KCl
(C) Fe2O3 + 3CO → 2Fe + 3CO2
(D) H2 + PbO → Pb + H2O
▶️Answer/Explanation
Ans: D
Question
The equation for the reaction between sodium bromide and concentrated sulfuric acid is shown.
2NaBr + 2H2SO4 → Na2SO4 + Br2 + SO2 + 2H2O
What is oxidised in this reaction?
(A) sodium ions
(B) bromide ions
(C) hydrogen ions
(D) sulfate ions
▶Answer/Explanation
Ans :B
Question
The ionic equation for the reaction between iron(II) chloride and chlorine is shown.
2Fe$^{2+}$ + Cl$_{2}$ → 2Fe$^{3+}$ + 2C$^{l-}$
Which row shows the substance that is reduced and the oxidising agent?
▶️Answer/Explanation
Ans: A