Question

Cerium $(Z=58)$ is an important member of the lanthanides. 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 the +4 oxidation state
• C. The +4 oxidation state of cerium is not known in solutions
• D. Cerium (IV) acts as an oxidising agent

Answer 1

Answer: (C)

+3 and +4 states are shown by Ce in aqueous solution. Thus statement is incorrect.