In which species does sulphur have the lowest oxidation state?

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${SF}_{6}$

${SCl}_{2}$

$H_{2} {SO}_{3}$

${OSF}_{2}$

answer is A.

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Detailed Solution

Since chlorine has a stronger electronegativity than oxygen, the bond's electrons will be allocated to it. Chlorine will therefore have an oxidation number of 1. Since the sum of the oxidation numbers must equal 0, if chlorine has -1, then Sulphur must have +2, since,

$x = 2 + 2 * (- 1)$

$x = 0 .$

Hence, option A is correct.

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