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  4. In the given below, which ion cannot give iodometric titrations?

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Q. In the given below, which ion cannot give iodometric titrations?

NTA AbhyasNTA Abhyas 2022

Solution:

Atom in highest oxidation state can oxidize iodide to liberate $I_{2}$ which is volumetrically measured by iodometric titration using hypo solution.
$2I^{-} \rightarrow I_{2}$
$Pb^{+ 2} \rightarrow $ Lowest oxidation state can not oxidise iodide to $I_{2}$ .