Cerium `(Z= 58)` is an important nember of the lanthanoids . Which of the following statements about cerium is incorrect ?A. The common oxidation state 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 solution.D. Cerium (Iv) acts as an oxidising agent.

Cerium `(Z= 58)` is an important nember of the lanthanoids . Which of

1.	Cerium `(Z= 58)` is an important nember of the lanthanoids . Which of the following statements about cerium is incorrect ?A. The common oxidation state 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 solution.D. Cerium (Iv) acts as an oxidising agent.
Answer» Correct Answer - 3 (3) Cerium can also show the oxidation state of `+4` in solution as it leads to a noble gas configuration, from `[Xe]^(54) 4f^(1) 5d^(1) 6s^(2)` to `[Xe]^(54)`, after losing four electrons. It is only `Ce^(4+)` which exits in solution among the lanthanides.

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