Chemistry
Grade-9
Easy
Question
Which of the following ions will result in an aqueous solution that is colourless? (atomic no. Sc = 21, Fe = 26, Ti = 22, Mn = 25)
- Mn2+
- Sc3+
- Fe2+
- Ti3+
Hint:
Electron config of Sc3+ is [Ar] 3d0.
The correct answer is: Sc3+
Sc3+ ions will result in an aqueous solution that is colorless as it does not any unpaired electron.
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