1.

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

Answer»

The COMMON oxidation STATES of cerium are `+3` and `+4`
The `+3` oxidation state of cerium is more stable than `+4` oxidation state.
The `+4` oxidation state of cerium is not KNOWN in solution
Cerium (IV) acts as an oxidaizing agent.

Solution :`Ce^(4+)` EXISTIN solution THOUGH it tends to change to more stable `Ce^(3+)`


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