Explain the following :
Out of `Sc^(3+), Co^(2+)` and `Cr^(3+)` ions, only `Sc^(3+)` is colourless in aqueous solutions. (Atomic no. : Co = 27 Sc = 21 and Cr = 24)

Explain the following : (a) Out of Sc^(3+), Co^(2+) " and "Cr^(3+) "ions, only "Sc^(3+) is colourless in aqueous solutions. (Atomic no.: Co =27, Sc = 21 and Cr =24) (b) The E^(@)Cu^(2+)//Cu for copper metal is positive (+0.34), unlike the remaining members of the first transition series. (c) La(OH)_(3) " is more basic than Lu "(OH)_(3).

Sc^(3+) is colourless is aqueous solution whereas Ti^(3+) is coloured.

Which one of the following forms a colourless solution in aqueous medium ? (Atomic number : Sc =21, Ti = 22, V = 23 , and Cr = 24 )

Out of the following ions Ti^(3+), V^(3+), Cu^(+), Sc^(3+), Mn^(3+) and Co^(2+) the colourless ions will be

The spin only magnetic of Cr^(3+) in aqueous solution would be :

In which of the following paris both the ions are coloured in aqueous solution? (Atomic number, Sc - 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)