Question

Select the correct option, 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(III), Cu(II) are diamagnetic
• D. Sc(III), Ti(IV) are diamagnetic and Pd(II), Cu(III) are paramagnetic.

Answer 1

Answer: (D)

Sc(III), Ti(IV) are diamagnetic and Pd(II), Cu(III) are paramagnetic.

Answer 2

$Sc^{3 +}(3d^{0}),Ti^{4 +}(3d^{0})$ are diamagnetic while $Pd^{2 +}$ ($4d^{8}$) and $Cu^{2 +}(3d^{9})$ are paramagnetic.