1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the group element does not form M(III) iodide?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Which of the group element does not form M(III) iodide?

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

Due to inert pair effect, $\text{Tl}$ prefers its $\text{+1}$ oxidation state while bonding with iodine and $\text{TlI}$ form. Although thallium $\text{(Tl)}$ form $TlI_{3}$ , but the O.S. of thallium is $\text{+1}$ in this compound, because iodine is present as tri-iodide ion $\left(I_{3}^{-}\right).$