Q. Which of the following statement is not correct?
A) $La(OH)_{3}$ is less basic than $Lu(OH)_{3}$
B) In lanthanide series ionic radius of $Ln^{3 +}$ ions decrease
C) Zn, Cd, Hg are colourless and are diamagnetic
D) Mn shows maximum oxidation state is +7
Explanation
(a)
$La(OH)_{3}\$is more basic than $Lu(OH)_{3}$. This is because ionic size of $La^{3 +}$ ion is more than $Lu^{3 +}$ ion
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.