In the redox reaction MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂, the oxidizing agent is:

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MnO₂ oxidizes HCl (Cl⁻ to Cl₂) while itself being reduced (Mn⁴⁺ to Mn²⁺). Oxidizing agent (oxidant) accepts electrons and gets reduced. Here, MnO₂ accepts electrons from Cl⁻. HCl is the reducing agent (reductant) as it loses electrons. This reaction was used by Scheele to discover chlorine. Exam tip: The substance reduced is the oxidizing agent; the substance oxidized is the reducing agent.

In the redox reaction MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂, the oxidizing agent is: MCQ with Answer and Explanation

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