Post-UTME Chemistry 2018 Objective — Question 13
Question 13 of 21 from the Post-UTME Screening (Post-UTME) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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The decomposition of potassium trioxochlorate (V) in the presence of manganese (IV) oxide is represented by
- A. 2KClO3 -> 2KCl + 3O2Correct
- B. KClO3 -> KClO + Mn + 2O2
- C. 2KClO3 -> 2KMnO4 + Cl2 + O2
- D. 2KClO3 -> 2KCl + Mn + 4O2
Explanation
MnO2 catalyses the decomposition of potassium trioxochlorate(V) (KClO3) into potassium chloride and oxygen gas: 2KClO3 -> 2KCl + 3O2.
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