Question

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

Answer 1

Answer:

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Explanation:

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.

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Answer 2

Answer: When finely powdered iron and sulphur are heated together a chemical change occurs.

Explanation: Because, On heating the reaction mixture, the sulphur melts and reacts with the iron exothermically to form iron(II) sulphide. ... The signs that a chemical reaction occurs are: the glow, and the fact that a new substance (black iron sulphide) is formed which cannot be separated by using a magnet.

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