Question

we mix iron fillings with Sulphur and grind it, and we heat the mixture, a chemical change takes place. using the above example explain the chemical change.

Answer 1

Hey !!!!

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When, We Mix Iron Fillings with sulphur and Heat It, A Resulting Brown-Black Compound is being Formed.... This Is a Chemical Change...

Equation for This : Fe + S -------> FeS

That Brown Black color is called, Ferrous Sulphide

Now, Lets Understand, How Its a Chemical change....

Mate, If we mix it with hands only, It will be a  mixture and, If we Bring a Magnet near the Mixture, Iron Fillings will get attracted into the magnet

While, If we bring a Magnet near a compound of FeS, Iron doesn't get attracted near the magnet...

Hence, By This, There's a Change in property, Hence, This clearly indicates a chemical change....

The new properties we got [Which indicate a chemical change] :

1) Properties Changed.... {Magnetic Properties, From Yes to No }

2) Change in color {From, Yellow to Brown Black}

3) Change in state {From Power form to Hard solid form}

These changes clearly indicates us a chemical change...

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Thanks....!!!

Hope This Helps...!!!