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Chemistry · PYQ NEET UG 2020

हिन्दी

Which of the following oxoacid of sulphur has \( - \text{O} - \text{O} - \) linkage?

  1. \( \text{H}_2\text{SO}_4 \), sulphuric acid
  2. \( \text{H}_2\text{S}_2\text{O}_8 \), peroxodisulphuric acid
  3. \( \text{H}_2\text{S}_2\text{O}_7 \), pyrosulphuric acid
  4. \( \text{H}_2\text{SO}_3 \), sulphurous acid

Correct answer · Option 2

\( \text{H}_2\text{S}_2\text{O}_8 \), peroxodisulphuric acid

Explanation

Peroxodisulphuric acid (Marshall's acid, \( \text{H}_2\text{S}_2\text{O}_8 \)) contains a peroxide linkage \( ( -\text{O}-\text{O}- ) \) between two sulphur atoms.
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