Chemistry

Problem

Incorrect order of ionic size is : a.

\text{La}^{3+} > \text{Gd}^{3+} > \text{Eu}^{3+} > \text{Lu}^{3+}

\text{V}^{2+} > \text{V}^{3+} > \text{V}^{4+} > \text{V}^{5+}

\text{Tl}^+ > \text{In}^+ > \text{Sn}^{2+} > \text{Sb}^{3+}

\text{K}^+ > \text{Sc}^{3+} > \text{V}^{5+} > \text{Mn}^{7+}