Why `Zn^(2+)` salts are white while `Ni^(2+)` salts are coloured?

Why Zn^(2+) is diamagnetic whereas Mn^(2+) is paramagnetic ?

(A) Ni^(+2) salts are pink in colour (R) Ni^(+2) absorb light in IR region

In the given statements the number of statements are incorrect Statement-1 : Hydrated Cu(II) salts are blue and anhydrated salts Cu(II) salts are colourless. Statement-2 : HgCl_(2) A white sublimable substance that in solution forms a white precipitate with NH_(3) Statement-3: Separation of Cu^(+2) and Zn^(+2) ions is not possible by using NaOH. Statement-4 : Pb^(+2), Ag^(+) cations can be separated by using an NH_(3) solution.

Which of the following salts are black in colour?

Lithium salts are mostly hydrated . Why ?

Which salt gives crimson colour in flame

Aqueous Cu^(2+) ions are blue in colour, where as Aqueous Zn^(2+) ions are colourless. Why ?

Identify the correct statements among the following I) Both Cr and Cu show +1 oxidation state II) The complementary colour of absorbed green colour of visible radiation is purple. III) Ni^(+2) ion in its hydrated state exhibits green colour IV) Devarda's alloy contains least percentage of 'Zn

why are some salts are called hydrated salts give 2 example of white colour hydrated salts with the chemical formula?