Question

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

• A. All the members exhibit +3 oxidation state.
• B. Because of similar properties the separation of lanthanoids is not easy.
• C. Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series.
• D. There is a gradual decrease in the radii of the members with increasing atomic number in the series.

Answer 1

The correct option is C Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series.

Availibilty of 4f electrons does not result in the formation of compounds in +4 oxidation state for all the members of the lanthanoid series.