InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Which one of the following forms a colourless solution in aqueous medium ? (Atomic number : `Sc =21, Ti = 22, V = 23`, and `Cr = 24`)A. `V^(3+)`B. `Cr^(3+)`C. `Ti^(3+)`D. `Sc^(3+)` |
|
Answer» Correct Answer - D Colour is usually due to d-d trnsition : `V (3d^(3) 4s^(2)) implies V^(3+) (3d^(2))` : coloured `Cr (3d^(5) 4s^(1)) implies Cr^(3+) (3d^(3))` : colored `Ti (3d^(2) 4s^(2)) implies Ti^(3+) (3d^(1))` : coloured `Sc (3d^(1) 4s^(2)) implies Sc^(3+) (3d^(0))` : colourless. |
|