Chemistry - Complete Pblock- Question with Solution | TestHub

As smallest cation is most hydrated here$\mathrm{C}\mathrm{l}{\mathrm{O}}_4^{-}$has smallest central atom as it has +7 charge on it and on$\mathrm{C}\mathrm{l}{\mathrm{O}}_3^{-}(+5),\mathrm{C}\mathrm{l}{\mathrm{O}}_2^{-}(+3),\mathrm{C}\mathrm{l}{\mathrm{O}}^{-}(+1)$so the order of hydration energy is${\text{ClO}}^{-}<{\text{ClO}}_{{}_2}^{-}<{\text{ClO}}_3^{-}<{\text{ClO}}_4^{-}$