Which of the following pair of ions have same paramagnetic moment?

1. $\mathrm{Cu}^{2+}, \mathrm{Ti}^{3+}$
2. $\mathrm{Mn}^{2+}, \mathrm{Cu}^{2+}$
3. $\mathrm{Ti}^{4+}, \mathrm{Cu}^{2+}$
4. $\mathrm{Ti}^{3+}, \mathrm{Ni}^{2+}$

Solution

${ }_{29} \mathrm{Cu}=[\mathrm{Ar}] 3 d^{10} 4 s^1$
Both of these ions have one unpaired electron, hence these have same paramagnetic moment. .

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more THE D AND F BLOCK ELEMENTS questions on Aicharya