AP and TS EAMCET Engineering Model Paper 14

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Question : 155 of 159

Marks: +1, -0

In context of lanthanoides , which of the following statements is not correct ?

There is a gradual decrease in the ionic radii of members with increasing atomic number in the series .
All the members exhibit +3 oxidation state .
Because of similar properties the separation of lanthanoids is not easy .
All elements exhibit +4 oxidation state in their compounds

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