JEE Main 2011Annual, Paper 1ChemistryEasyd- and f-Block Elements158× since 2002In context of the lanthanoids, which of the following statements is not correct?AOption A. All the members exhibit +3 oxidation stateBOption B. Because of similar properties the separation of lanthanoids is not easy.COption C. Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series.DOption D. There is a gradual decrease in the radii of the members with increasing atomic number in the series.CheckSkip · show solution
