Q. Among Sc(III), Ti(IV), Pd(II) and Cu(II) ions
A) All are paramagnetic
B) All are diamagnetic
C) Sc (III), Ti (IV) are paramagnetic and Pd(II), Cu(II) are diamagnetic
D) Sc (III), Ti (IV) are diamagnetic and Pd(II), Cu(II) are paramagnetic
Explanation
(d)
$Sc^{3 +}\ \left( 3d^{0} \right),\ Ti^{4 +}(3d^{0})$ are diamagnetic due to absence of unpaired electrons. While $Pd^{2 +}\left( 4d^{8} \right),\ Cu^{2 +}(3d^{9})$ contain two, and one unpaired electron respectively. Hence, these are paramagnetic
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.