In the following redox reaction: 2KMnO₄ + 16HCl → 2KCl + 2MnCl₂ + 5Cl₂ + 8H₂O, which substance acts as the reducing agent?

KMnO₄
HCl
MnCl₂
Cl₂

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The oxidation state of Chlorine in HCl is -1 and it increases to 0 in Cl₂. Since Chlorine loses electrons, HCl is oxidized and thus acts as the reducing agent.

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