MCQ
Which of the following Compounds has peroxide linkage ?
- A${S_2}O_3^{ - 2}$
- ✓${S_2}O_8^{ - 2}$
- C${S_2}O_5^{ - 2}$
- D${S_2}O_7^{ - 2}$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$(A)$ $NO _3^{-}$ $(B)$ $Cl ^{-}$ $(C)$ $SCN ^{-}$ $(D)$ $CN ^{-}$
