State whether the following are physical or chemical changes.
(l) heating a mixture of iron fillings and sulphur

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Solution

Heating a mixture of iron fillings and sulphur is a chemical change. This is because, when iron filings and sulphur powder are mixed and heated, they undergo a chemical reaction and form a new substance called ferrous sulphide.

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State whether the following are physical or chemical changes. (l) heating a mixture of iron fillings and sulphur

Heating a mixture of iron fillings and sulphur is a chemical change. This is because, when iron filings and sulphur powder are mixed and heated, they undergo a chemical reaction and form a new substance called ferrous sulphide.

State whether the following are physical or chemical changes.
(l) heating a mixture of iron fillings and sulphur