Question:
Which of the following molecular formulae represents peroxy disulfuric acid?
Which of the following molecular formulae represents peroxy disulfuric acid?
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Peroxydisulfuric acid has two sulphur atoms joined through a peroxide linkage.
Updated On: Nov 12, 2026
- \(\text{H}_{2}\text{S}_{2}\text{O}_{7}\)
- \(\text{H}_{2}\text{S}_{2}\text{O}_{8}\)
- \(\text{H}_{2}\text{S}_{2}\text{O}_{6}\)
- \(\text{H}_{2}\text{SO}_{5}\)
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Peroxydisulfuric acid is also called Marshall's acid and contains an \(-\text{O}-\text{O}-\) bridge between two sulphate units.
Step 2: Write the structure
\(\text{HO}_3\text{S}-\text{O}-\text{O}-\text{SO}_3\text{H}\)
Step 3: Count the atoms
Two H, two S and \(3+2+3=8\) oxygen atoms, giving \(\text{H}_{2}\text{S}_{2}\text{O}_{8}\).
Final Answer:
Peroxydisulfuric acid is H2S2O8. \[ \boxed{\text{(B) }\text{H}_{2}\text{S}_{2}\text{O}_{8}} \]
Peroxydisulfuric acid is also called Marshall's acid and contains an \(-\text{O}-\text{O}-\) bridge between two sulphate units.
Step 2: Write the structure
\(\text{HO}_3\text{S}-\text{O}-\text{O}-\text{SO}_3\text{H}\)
Step 3: Count the atoms
Two H, two S and \(3+2+3=8\) oxygen atoms, giving \(\text{H}_{2}\text{S}_{2}\text{O}_{8}\).
Final Answer:
Peroxydisulfuric acid is H2S2O8. \[ \boxed{\text{(B) }\text{H}_{2}\text{S}_{2}\text{O}_{8}} \]
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