Question

Among the four complexes of Ni given below, select the complexes which can be attracted by magnetic field.
(I) $\left[Ni\right(C{N}_4){]}^{2-}$ (II) $[NiC{l}_4{]}^{2-}$ (III) $Ni(CO{)}_4$ (IV) $\left[Ni\right(H_{2}O{)}_6{]}^{2+}$

• A. I only
• B. II and III only
• C. II, III and IV
• D. II and IV

Answer 1

The correct option is D II and IV

(II) and (IV) are weak field ligands, so, in crystal field they will be paramagnetic in nature, hence, attracted by the magnetic field.