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JEE Main2011Chemistryd and f Block ElementsActual

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

Options

  1. AAll the members exhibit +3 oxidation state
  2. BBecause of similar properties the separation of lanthanoids is not easy.
  3. CAvailability of 4 f electrons results in the formation of compounds in +4 state for all the members of the ser
  4. DThere is a gradual decrease in the radii of the members with increasing atomic number in the series.

Correct answer

C. Availability of 4 f electrons results in the formation of compounds in +4 state for all the members of the ser

Step-by-step solution

The general o.s of lanthanides is +3 , only few elements exhibit +4 o.s.

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