Assertion :When iron is heated with sulphur, iron sulphide is formed. The total mass of iron and sulphur is equal to the mass of iron sulphide. Reason: Law of conservation of mass states that the total mass of reactants = total mass of products.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The reaction proceeds as follows:
$F e + S \to F e S$
As we can see that both of them are combining and only one product is formed in the reaction. The mass of FeS formed is equal to the mass of Fe & S according to the "law of conservation of mass" which states that the total mass of reactants = total mass of products.

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(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
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