Solution :
The oxidation state in both ( lanthanide and actinide ) is $$+3.$$ The property of actinide are very similar to those of lanthanide when both are in $$+3$$ state.
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is