d and f-Block ElementsHard

Question

Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?

Options

A.The common oxidation states of cerium are + 3 and + 4
B.Cerium (IV) acts as an oxidizing agent
C.The + 4 oxidation state of cerium is not known in solutions
D.The + 3 oxidation state of cerium is more stable than the + 4 oxidation state

Solution

Oxidation potential of Ce(IV) in aqueous solution is supposed to be - ve i.e. - 0.784 V at 25oC

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