In which of the following transition metal ion (aquated) is not correctly matched with its colour?
Show Hint
Memorize the colours of common aqueous transition metal ions:
- Fe\(^{2+}\): Pale Green
- Fe\(^{3+}\): Yellow/Brown
- Cu\(^{2+}\): Blue
- Mn\(^{2+}\): Pale Pink
- Co\(^{2+}\): Pink
- Ni\(^{2+}\): Green
- Cr\(^{3+}\): Green/Violet