Question

Identify the set of paramagnetic ions among the following.

• A. \(\text{V}^{+2},\text{Co}^{+2},\text{Ti}^{+4}\)
• B. \(\text{Ni}^{+2},\text{Cu}^{+2},\text{Zn}^{+2}\)
• C. \(\text{Ti}^{+2},\text{Cu}^{+2},\text{Mn}^{+3}\)
• D. \(\text{Sc}^{+3},\text{Ti}^{+3},\text{V}^{+3}\)

Hint:

Paramagnetic ions have at least one unpaired d electron.

Answer 1

The Correct Option is C

Step 1: Count unpaired electrons
Set (C): $2+1+4$ unpaired electrons, each ion has some, so all are paramagnetic.
In every other set at least one ion has $d^0$ or $d^{10}$, so no unpaired electrons.

Final Answer:
Option (C). \[ \boxed{\text{(C)}} \]