Question 9 I. One of the following reactions is redox (oxidation-reduction). Determine which is redox and why. (Explain your answer by calculating oxidation numbers as well as explaining in words why you have chosen that reaction.) a. Pb(NO3)2 +2KI Pbl₂ +2KNO3 (8 marks) b. Fe + CuSO4 → FeSO4 + Cu (4 marks)/nII. Determine which is the oxidising agent and reducing agent in the following reaction. (Show calculation and give reasons for your choices.) Fe + O2 → Fe2O3 (4 marks)

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