Which of the following forms a set of complex and a double salt, respectively?

Salt, which when dissolved in water undergo partial ionisation and forms a simple cation and a complex anion, or a simple anion or a complex cation, is a complex compound, e.g., K₂PtCl₂.2NH₃.
Salt, which when dissolved in water, undergoes complete ionization and forms simple cation and two different simple anions or a simple anion and two different simple cations, e.g., Alum, mohr’s salt.