(A) The correct statement is that $La(OH)_3$ is more basic than $Lu(OH)_3$. As we move from $La^{3+}$ to $Lu^{3+}$,the ionic size decreases due to lan

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$La(OH)_3$ is less basic than $Lu(OH)_3$.

(A) The correct statement is that $La(OH)_3$ is more basic than $Lu(OH)_3$. As we move from $La^{3+}$ to $Lu^{3+}$,the ionic size decreases due to lanthanoid contraction,which increases the covalent character and decreases the basicity. Therefore,$La(OH)_3$ is the most basic and $Lu(OH)_3$ is the least basic. Option $A$ is incorrect.

Class 12 Chemistry d-and f-Block Elements Lanthanoids and Actinoids

Medium

Which of the following statements is incorrect?

A
$La(OH)_3$ is less basic than $Lu(OH)_3$.
B
In the lanthanoid series,the ionic radius decreases from $Ce^{3+}$ to $Lu^{3+}$.
C
Lanthanum is actually a transition element.
D
Due to lanthanoid contraction,the atomic radii of $Zr$ and $Hf$ are similar.