In any transition series, from left to right, the d-orbitals are progressively filled and their properties vary accordingly.
Q. Which of the following pair of compounds is expected to exhibit same colour in aqueous solution?

Options

A. `FeCl_2,CuCl_2`
B. `VOCl_2,CuCl_2`
C. `VOCl_2,FeCl_2`
D. `FeCl_2,MnCl_2`

Answer

b

Explanation

Both `V^(4+)` and `Cu^(o+)` have one unpaired electron in the d-orbital `V^(4+)=3d^1,Cu^(o+)=3d^9`