Silver nitrate solution is gradually added to an aqueous solution containing 0.01 M each of chloride, bromide and iodide ions. The correct sequence in which the halides will be precipitated is

The ${\mathrm{K}}_{\mathrm{SP}}$ values are in the order :

AgCl > AgBr > AgI

Lesser the ${\mathrm{K}}_{\mathrm{sp}}$, less is solubility and easily precipitated Down the group  hydration of ion decreases, so solubility decreases and precipitation increases