MCQ
Choose the correct order of the acidity
- A${\left[ {Mn{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Ni{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Al{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }} < {\left[ {Fe{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }}$
- B${\left[ {Ni{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Mn{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Al{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }} < {\left[ {Fe{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }}$
- ✓${\left[ {Mn{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Ni{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Fe{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }} < {\left[ {Al{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }}$
- D${\left[ {Ni{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Mn{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }} < {\left[ {Fe{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }} < {\left[ {Al{{\left( {{H_2}O} \right)}_6}} \right]^{3 + }}$