when iron and sulphur are heated together a grey mass is formed which is attracted by a magnet
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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). It is a new substance which has properties entirely different from Fe and S.Therefore, heating of mixture of iron and sulphur powder is a chemical change.
Behaviour towards a magnet---Iron filings cling to magnet.No particle attaches to magnet.
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falseis the answer. I hope this answer is helpful
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