Cerium `(Z= 58)` is an important nember 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 tan +4 oxidation state.
C. The +4 oxidation state of cerium is not known in solutions.
D. Cerium (IV)acts as an oxidising agent.
