Chemistry · PYQ NEET UG 2020

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

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