What happens when dilute HCl is poured on a mixture of iron and sulphur.

If we will take a mixture of Fe and sulfur and add Dilute HCl only iron will react to form FeCl2, reaction will takes place as follows

Fe + 2HCl → FeCl2 + H2 .

But if the mixture of Fe and S is heated they form FeS. If we add HCl in FeS it will release H2S. Reaction takes place as follows:
FeS + 2HCl → FeCl2 + H2S

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when HCl is poured on a mixture of iron and sulphur, a chemical reaction occurs where the iron in the mixture reacts with the HCl and releases hydrogen gas

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