Assertion : The formal oxidation no. of sulphur in $\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6$ is 2.5 .…

Assertion : The formal oxidation no. of sulphur in $\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6$ is 2.5 . Reason : Two S-atoms are not directly linked with $\mathrm{O}$-atoms.
  1. If both assertion and reason are true and reason is the correct explanation of assertion.
  2. If both assertion and reason are true but reason is not the correct explanation of assertion.
  3. If assertion is true but reason is false.
  4. If both assertion and reason are false.

Solution

Formal oxidation number of sulphur $=\frac{2 \times 5+2 \times 0}{4}=2.5$

Asked in: NEET 2004

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