Which ions are used as catalysts in the reaction between persulfate ions and iodide ions?
Correct answer: B. Iron
- A. Lead
- B. Iron
- C. Copper
- D. Chromium
Explanation
Fe 2+ and Fe3+ ions are used as catalysts in this reaction since both the reactants are negatively charged, they repel each other, leading to a high activation energy.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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