Which of the following cannot give iodometric titrations?

Options

A. `Fe^(3+)`
B. `Cu^(2+)`
C. `Pb^(2+)`
D. `Ag^(2+)`

Answer

C

Explanation

Atom in highest oxidation state can oxidize iodide to liberate ` I_2` which is volumetrically measured by iodometric titration using hypo.
`2I^(-) to I_(2)`
`Pb^(2+)` rArr lowest oxidation state can not oxidize iodide to `I_(2)`