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Although + 3 is the characteristic oxida...

Although + 3 is the characteristic oxidation state for lanthanoids but cerium also shows + 4 oxidation states, because -

A

it has variable ionisation enthalpy.

B

it has a tendency to attain noble gas configuration

C

it has a tendency to attain `f^(0)` configuration

D

it resembles `Pb^(4+)`

Text Solution

Verified by Experts

The correct Answer is:
B, C
`+4` oxidation state of cerium is stable because it attains `f^(0)` configuration as well as noble gas - like electronic structure.
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Knowledge Check

  • Fe shows an oxidation state of +1 in

    A
    `Fe(CO)_5`
    B
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    C
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    D
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