MCQ
There is no $S-S$ linkage is
- A$S_2O_3^{-2}$
- B$S_2O_5^{-2}$
- C$S_2O_6^{-2}$
- ✓$S_2O_7^{-2}$

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Give the structural formula of compound $(B)$
[Given, molar mass of $A =100 \,g\, mol ^{-1} ; B =200 \,g\, mol ^{-1}$$\left. C =10,000 \,g\, mol ^{-1}\right]$