Question

When finely powdered iron and sulphur are heated together, a chemical change occurs. Why??​

Answer 1

Answer:

When iron filings and sulphur powder are mixed, both retain their properties. It means they have not undergone any chemical reaction. Therefore, mixing of iron and sulphur is a physical change. When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide.

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Answer 2

Answer:

Exothermic reaction occur and iron sulfide form.

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