A-LevelChemistryElectrochemistryMay/June 2023Paper 1 Q121 Mark
The vanadium salt, VOSO₄, is soluble in water and reacts readily with powdered manganese in dilute sulfuric acid. The equation for the reaction is shown. Mn(s) + 2VOSO₄(aq) + 2H₂SO₄(aq) → V₂(SO₄)₃(aq) + MnSO₄(aq) + 2H₂O(l) Which statement about this reaction is correct?
AHydrogen is oxidised in the reaction.
BManganese is the reducing agent in this reaction.
CSulfuric acid is the oxidising agent in this reaction.
DThe oxidation state of the vanadium changes from +5 to +3.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep