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| 1. |
[Ni(CN)_(4)]^(2-) is colourless whereas [Ni(H_(2)O)_(6))^(2+) is green. Why? |
| Answer» SOLUTION :In `[Ni(H_(2)O)_(6)]^(2+), Ni^(2+)` has TWO unpaired electrons which do not pair up in the presence of WEAK ligand `H_(2)O`, THEREFORE, excitation from lower d-orbitals to higher d-orbitals gives the colour. | |