A) +6, +7
B) +6, +6
C) +7, +7
D) +4, +4
Correct Answer: B
Solution :
[b] Idea This question can be solved by knowing the structure of oxyacids of sulphur and determination of their oxidation state. Students are advised to write the molecular structure first, then to calculate the oxidation state of sulphur. Marshell's acid \[={{H}_{2}}{{S}_{2}}{{O}_{8}}=\] peroxy disulphuric acid Caro's acid \[={{H}_{2}}S{{O}_{5}}=\] peroxo-mono-sulphuric acid. The oxidation state of sulphur in both the acidjs +6. There are S - S linkages. TEST Edge: These type of question are asked in JEE Main very frequently, so students are advised to study the information relating structure of oxyacids of nitrogen, phosphorous and chlorine. Which may also be asked.
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