Question

In the complex ${\left[Ni{\left(H_{2}O\right)}_2{\left(N{H}_3\right)}_4\right]}^{+2}$ the magnetic moment $\left(\mu \right)$ of $Ni$ is :

• A. Zero
• B. 2.83 BM
• C. 1.73 BM
• D. 3.87 BM

Answer 1

The correct option is B 2.83 BM

Option (B) is correct.
In the complex ${\left[Ni{\left(H_{2}O\right)}_2{\left(N{H}_3\right)}_4\right]}^{+2}$ the magnetic moment $\left(\mu \right)$ of $Ni$ is $2.83BM$.In this complex $Ni$ has $d^8$ orbitals and has 2 unpaired electrons.
$\left(\mu \right)$ = $\sqrt{n(n+2)}$
= $\sqrt{2(2+2)}$
= $2.83BM$