Identify correct acidic strength order in the following compounds.
A
i > ii > iii
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B
iii > ii > i
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C
i > iii > ii
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D
iii > i > ii
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Solution
The correct option is B iii > ii > i
The conjugate base formed in (ii) and (iii) can be stabilized by delocalization of the negative charge in to the vacant d orbitals of S. (iii) has two suphur and hence it is the most acidic.