Question

A mixture of sulphur powder and iron filings is a

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 (FeS).

Answer 2

Answer:

The mixture of sulphur powder and iron fillings is a Heterogeneous mixture