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Q.

 Incorrect statement with reference to Ce (Z = 58)

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a

 Atomic size of Ce is more than that of Lu.

b

 Ce in +3 oxidation state is more stable than
in +4.

c

Ce4+ is a reducing agent.

d

 Ce shows common oxidation states of +3
and +4.

answer is A.

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Detailed Solution

  • Ce4+ is a good oxidizing agent in aqueous solution.
  • Ce4+ can change into most stable oxidation state by only gaining one electron that's why it is a good oxidizing agent.
  • Ce4+ is actually an oxidizing agent not a reducing agent.
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