Post Utme Nile University 2021 Chemistry Question 18

Practice objective / multiple choice question 18 from the 2021 Post Utme Nile University Chemistry examination.

Post Utme Nile University 2021 Chemistry Objective / Multiple Choice
Question 18 POST_UTME_NILE_UNIVERSITY • 2021 • CHEMISTRY • objective

A redox reaction involves the oxidation of Cu(s) to Cu2+(aq) and the reduction of MnO4-(aq) to Mn2+(aq). Write the balanced half-reactions and the overall balanced equation.

Answer Options

Correct Answer A. Cu(s) → Cu2+(aq) + 2e-; MnO4-(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l)
B. Cu(s) → Cu2+(aq) + 2e-; MnO4-(aq) + 2H2O(l) + 3e- → Mn2+(aq) + 4OH-(aq)
C. Cu(s) → Cu2+(aq) + 2e-; MnO4-(aq) + 4H+(aq) + 3e- → Mn2+(aq) + 2H2O(l)
D. Cu(s) → Cu2+(aq) + 2e-; MnO4-(aq) + 6H+(aq) + 4e- → Mn2+(aq) + 3H2O(l)
Correct Answer
A
Correct Option:
Cu(s) → Cu2+(aq) + 2e-; MnO4-(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l)

About This Question

This is Post Utme Nile University 2021 Chemistry Question 18. It is one of the objective questions from the 2021 Post Utme Nile University Chemistry examination.

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