Question

On adding dilute HCl to a mixture of iron fillings and Sulphur, an odourless gas is produced. But a gas with rotten eggs is produced when the same acid is added to iron sulphide. Explain.

Answer 1

Iron sulfide reacts with hydrochloric acid, releasing the malodorous (rotten egg smell) and very toxic gas,hydrogen sulphide.

FeS + 2 HCl → FeCl2+ H2S

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Answer 2

HIII......

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