WAEC Chemistry 2014 Objective — Question 34
Question 34 of 50 from the West African Examinations Council (WAEC) Chemistry 2014 Objective paper, with the correct answer and a full explanation.
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What is the function of manganese (IV) oxide in the reaction represented by the following equation? MnO₂+4HCl→MnCl₂+2H₂O+Cl₂
- A. Catalyst
- B. Dehydrating agent
- C. Oxidizing agentCorrect
- D. Reducing agent
Explanation
Fluorine (the most electronegative element known) is the most reactive halogen; in this reaction, MnO2 acts as an oxidizing agent, being reduced from +4 to +2 while oxidizing Cl⁻ to Cl2.
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