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Which is the reducing agent in the following reaction? MnO2 (s) + 4HCl (aq) → MnCl2 (s) + 2H2O(ℓ) + Cl2 (ℓ)

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Which is the reducing agent in the following reaction?

MnO2 (s) + 4HCl(aq) → MnCl2(s) + 2H2O(ℓ) + Cl2(ℓ)

A. MnO2(s) 

B. HCl(aq) 

C. MnCl2(s) 

D. Cl2(g)

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HCl is oxidized by gaining oxygen atoms. Thus, HCl is a reducing agent as it undergoes oxidation.

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