Q. Which of the following does not represents the correct order of the property indicated?
A) $Sc^{3 +} > Cr^{3 +} > Fe^{3 +} > Mn^{3 +} -$ionic radii
B) $Sc < Ti < Cr < Mn -$ density
C) $Mn^{2 +} > Ni^{2 +} > Co^{2 +} < Fe^{2 +} -$ ionic radii
D) $FeO < CaO < MnO < CuO -$ basic nature
Explanation
(a)
$Sc^{3 +} > Cr^{3 +} > Fe^{3 +} > Mn^{3 +}$, the correct order is $Cr^{3 +} > Mn^{3 +} > Fe^{3 +} > Sc^{3 +}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.