iron filings and sulphur powder when mixed up showed their individual properties but after heating the mixture,they lost their individual properties why
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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.
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In a mixture, the substances just mix with each other and no new substances are formed. So, both the properties are shown.
When they are heated, a chemical reaction takes place and new substances are formed. So, new properties are shown.
The reaction is:
Fe + S --> FeS
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