Exam

JEE Advanced

Year

2010

Paper

Paper 2

Subject

Chemistry

Chapter

Coordination Compounds

JEE Advanced 2010 · Paper 2 · Chemistry · Coordination Compounds

The complex showing a spin-only magnetic moment of 2.82 B.M. is

The complex showing a spin-only magnetic moment of $2.82$ B.M. is

Step-by-step solution

$\mathrm{Ni}: 3 d^8 4 s^2 \quad \mathrm{Ni}^{2+}: 3 d^8$ Since, $\mathrm{Cl}$ is a weak field ligand, it doesn't cause pairing of electron.
Number of unpaired electrons, $n=2$ \mu=$\sqrt{n(n+2)}=\sqrt{2(2+2)} \mathrm{BM}=\sqrt{8} \mathrm{BM}=$2.82 $\mathrm{BM}$Coordination compound Conceptual III