When HCl reacts with manganese dioxide what does it evolve chlorine gas?

Answer:

When concentrated hydrochloric acid(HCl) reacts with manganese dioxide, chlorine gas, manganese(II) chloride and water are liberated. So chlorine gas evolves when HCl acid is added to manganese dioxide.

MnO2 + 4HCl → MnCl2 + 2H2O + Cl2

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