Q. Which one of the followng statements related to lanthanons is incorrect?
A) Europium shows +2 oxidation state.
B) The basicity decreases as the ionic radius decreases from Pr to Lu.
C) All the lanthanons are much more reactive than aluminium
D) Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis
Explanation
[Solution] The earlier lanthanoids resemble calcium in reactivity, but later ones behave more like aluminium; they are not all much more reactive than Al. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.