Question

When a mixture of iron filling and sulpher powder is heated in a china dish a black coloured compound of iron ks formed. what is the name and chemical formula of this compound? can we separate iron from this compound by using a bar magnet?

Answer 1

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.

Answer 2

Answer:

Explanation:

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.