In the formation of iron sulphide, by heating iron and sulphur, the mass of iron(II) sulphide __________ when compared with a total mass of iron and sulphur.

increases

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decreases

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remains same

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None of the above

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Solution

The correct option is C remains same
According to the law of conservation of mass, the total mass of reactants is equal to the total mass of products in a chemical reaction.
$F e + S \to F e S$
The total mass of $F e$ and $S$ = Total mass of iron sulphide
Option $C$ is correct.

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Similar questions

When a mixture of iron powder and sulphur powder is heated strongly to form iron sulphide, then heat energy is :

(a) released (b) first absorbed and then released

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