Why `Cd^(2+)` salts are white ? Cd=48

Why Zn^(2+) salts are colourless and Ni2+ salts are coloured?

Zn^(2+) salts are white while Cu^(2+) salts are blue, explain why ?

Zn (Zinc) salts are white while Cu^(2+) salts are coloured. Comment on it.

Zn salts are white, Ni^(++) salts are blue explain

Why Zn, Cd, Hg are soft and have low m.pt.

ABC is an isosceles triangle with AB = AC and AD is one of its altitudes. Is BD = CD? Why or why not?

In the cell: Cr(s)|Cr^(3+)(sq)||Cd^(2+)(aq)+Cd(s) Write down the anodic and cathodic reactions and the overall cell reaction.