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What happens when a mixture of iron and sulphur is heated with dilute H₂S₄O?

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  1. Sulphur present in the mixture does not react with dilute H₂S₄O Iron reacts with dilute H₂S₄O and on heating gives hydrogen gas.
    Fe (s) + H₂S₄O → FeSO₄(aq) + H₂(g)

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