Question

With respect to qualitative analysis of inorganic salt, how many of the following cations belong to group $IV?$
$Co^{2 +},Mg^{2 +},Ni^{2 +},Zn^{2 +},Sr^{2 +},Ca^{2 +},Mn^{2 +},Pb^{2 +},Al^{3 +}$

Answer 1

Among the given cations, group $IV$ cations are $Co^{2 +},Ni^{2 +},Mn^{2 +}$ and $Zn^{2 +}$ . These metals form chlorides, sulfides and hydroxides that are soluble under that prevail in the precipitations of Group I, II, and III.