A freshly prepared $\mathrm{F}\mathrm{e}(\mathrm{O}\mathrm{H}{)}_3$ precipitate is peptised by adding $\mathrm{F}\mathrm{e}\mathrm{C}{\mathrm{l}}_3$ solution. The charge on the colloidal particles is due to the preferential adsorption of

• A

  $\mathrm{C}{\mathrm{l}}^{-}$ ions
• Correct answer
  B

  $\mathrm{F}{\mathrm{e}}^{3+}$ ions
• C

  $\mathrm{O}{\mathrm{H}}^{-}$ ions
• D

  $\mathrm{F}{\mathrm{e}}^{+2}$ ions

Hence, the correct answer is option: 'B'.