On the basis of the following observations made with aqueous solutions, assign secondary valences to metals in the following compounds:

On the basis of the following observations made with aqueous solutions, assign secondary valencies to metals in the following compounds.

On the basis of the following observations made with aqueous solutions , assign primary and secondary valencies to metals in the following compounds .

On the basis of the following observations made with acqueous solutions. In which of the following complexes the central metal atom exhibits secondary valency is six

On the basis of the following observations made with aqueous solutions, how many of them have 6 secondary valencies ? {:(" Formula","Moles of AgCl precipitated per mole of the compounds with excess" AgNO_(3)),((a) PdCl_(2).4NH_(3)," "2),((b) NiCl_(2).6H_(2)O," "2),((c) PtCl_(4).2HCl," "0),((d) CoCl_(3).4NH_(3)," "1),((e) PtCl_(2).2NH_(3)," "0):}

Which of the following metal ions is colored in aqueous solution ?

Explain the following observation : Cu^+ ion is not known in aqueous solutions.