Assertion : $S O_{2}$ and $S O_{3}$ obey 'law of multiple proportions'. Reason: Every sample of $S O_{2}$ contains $1$ part sulphur and $1$ part oxygen by mass.
Read the above assertion and reason and choose the correct option regarding it.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
$S O_{2}$ and $S O_{3}$ obey the law of multiple proportions,
Every sample of $S O_{2}$ contains $1$ part of sulphur and $2$ parts of oxygen by mass.

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