Question

The spin only magnetic moments (in $BM)$ for free $T{i}^{3+},V^{2+}andS{c}^{3+}$ ions respectively are

$(At.No-Sc:21,Ti:22,V:23)$

• A. $1.73,0,3.87$
• B. $3.87,1.73,0$
• C. $0,3,87,1.73$
• D. $1.73,3.87,0$

Answer 1

The correct option is D $1.73,3.87,0$

$\text{Magnetic moment,}\mu =\sqrt{n(n+2)}BM$
where, n is number of unpaired electrons.
The electronic configuration and magnetic moment of the given species are

$T{i}^{3+}:3d^1\text{(1 unpaired electron)}\mu =1.73BM$

$V^{2+}:3d^3\text{(3 unpaired electron)}\mu =3.87BM$

$S{c}^{3+}:3d^0\text{(no unpaired electron)}\mu =0$

Hence, option (a) is correct.