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Standard XII

Chemistry

Trend in Electronegativity

Assertion :Th...

Question

Assertion :The formal oxidation no. of sulphur in $N a_{2} S_{4} O_{6}$ is $2.5$ . Reason: Two $S -$ atoms are not directly linked with $O -$ atoms.

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 formal oxidation number of sulphur in the given compound will be

$= \frac{(2 \times 5) + (2 \times 0)}{4} = 2.5$

Since in the structure, $S -$ atoms are not directly linked we get that oxidation state.

Hence option $A$ is correct.

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Assertion :The formal oxidation no. of sulphur in Na2S4O6 is 2.5. Reason: Two S− atoms are not directly linked with O− atoms.

Assertion :The formal oxidation no. of sulphur in $N a_{2} S_{4} O_{6}$ is $2.5$ . Reason: Two $S -$ atoms are not directly linked with $O -$ atoms.