1.

In context of the lanthanoids, which of the following statements is not correct?A. There is a gradual decrease in the radii of the members with increasing atomic number in the seriesB. All the members exbibit +3 oxidation stateC. Because of similar properties the separation of lanthanoids is not easyD. Availability of 4f-electrons results in the formation of · compounds in +4 state for all members of the series

Answer» Correct Answer - D
Formation of +4 oxidation state requires very high energy, thus incorrect.


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