Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect? (a) The common oxidation states of cerium are +3 and +4. (b) The +3 oxidation state of cerium is more stable than +4 oxidation state. (c) The +4 oxidation state of cerium is not known in solutions. (d) Cerium (IV) acts as an oxidising agent.
Correct option(c) The +4 oxidation state of cerium is not known in solutions.
Explanation:
+3 and +4 states are shown by Ce in aqueous solution Thus, statement (c) is incorrect.
