Which of the following cannot give iodometric titration?

Which of the following cannot give iodometric titration?
  1. $\mathrm{Fe}^{3+}$
  2. $\mathrm{Cu}^{2+}$
  3. $\mathrm{Pb}^{2+}$
  4. $\mathrm{Ag}^{2+}$

Solution

There is no reaction between $\mathrm{I}^{-}$ and $\mathrm{Fe}^{3+}$.

Asked in: BITSAT 2011

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