In the wet tests for identification of various cations by precipitate, which transition element cation doesn’t belong to group IV in qualitative inorganic analysis?
\( \mathrm{Co^{2+}} \)
\( \mathrm{Zn^{2+}} \)
\( \mathrm{Ni^{2+}} \)
\( \mathrm{Fe^{3+}} \)
