Chemistry - Complete d-block Question with Solution | TestHub

Paramagnetic nature depends upon the number of unpaired electrons. Higher the number of unpaired electrons, higher the paramagnetic property will be. ${\mathrm{Cu}}^{2+}=[\mathrm{Ar}]3d^9$, no. of unpairedelectrons $=1$ ${\mathrm{V}}^{2+}=[\mathrm{Ar}]3d^3$, no. ofunpaired electrons $=3$ ${\mathrm{Cr}}^{2+}=[\mathrm{Ar}]3d^4$, no. of unpaired electrons $=4$ ${\mathrm{Mn}}^{2+}=[\mathrm{Ar}]3{\mathring{A}}^5$, no. of unpairedelectrons $=5$ Hence, correct order is $${\mathrm{Cu}}^{2+}<{\mathrm{V}}^{2+}<{\mathrm{Cr}}^{2+}<{\mathrm{Mn}}^{2+}$$