(a) of the ions `Ag^(+),Co^(2+)` and `Ti^(+)`, which one will be coloured in aqueous solution? (Atomic no. s: Ag=47,Co=27,Ti=22)
(b) If each ore each one of the above ionic species is in turn placed in a magnetic field, how will it respond and why?

Explanation

(a) `Co^(2+)` will be coloured because it contains unpaired electrons. On the other hand , `Ag^(+)` has completely filled 3d subshell and `Ti^(4+)` has empty 3d subshell, therefore , they will be colourless.
(b) `Co^(2+)` will be attracted by a magnetic field while `Ag^(+)` and `Ti^(4+)` ioniswill be repelled.