Question

Identify the set of paramagnetic ions among the following:

• A. $V^{2+},C{o}^{2+},T{i}^{4+}$
• B. $N{i}^{2+},C{u}^{2+},Z{n}^{2+}$
• C. $T{i}^{3+},C{u}^{2+},M{n}^{3+}$
• D. $S{c}^{3+},T{i}^{3+},V^{3+}$

Answer 1

Answer: (C)

The ions which contain unpaired electrons exhibit paramagnetic behaviour.

The electronic configuration of the ions are given below:

$T{i}^{3+}=1s^{2}2s^{2}2p^{6}3s^{2}3p^5$

$C{u}^{2+}=1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}3d^9$

$M{n}^{3+}=1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}3d^4$

Thus, all of them have unpaired electrons. Hence, they will show paramagnetic behaviour.

In option (B) $V^{3+}$ does not possess any unpaired electrons.

In option (C) $Z{n}^{2+}$ does not possess any unpaired electrons.

Similarly, in option (D) $Z{n}^{2+}$ does not possess any unpaired electrons.