In context of the lanthanoids, which of the following
Question:

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

  1.  Because of similar properties the separation of lanthanoids is not easy

  2. Availability of 4f electrons results in the formation of compounds in +4 state for all the

         members of the series

  3.  There is a gradual decrease in the radii of the members with increasing atomic number

         in the series

  4.  All the members exhibit +3 oxidation state


Correct Option: , 2

Solution:

Soloution is not required.

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