How to decide the 16th answer? Ans is (3):
16. Which is coloured because of d-d transition ?
(1) KMnO4 (2) K2CrO4
(3) CoCl3 (4) All of these.
The solution is as follows:
1. The correct option is (c) CoCl3.
2. The Co3+ has electronic configuration t2g5eg2. Thus, electrons form t2g transit to eg.
3. The Mn and Cr are in +7 and +6 state respectively and thus have empty d orbital. Thus, no scope for d-d transition.
1. The correct option is (c) CoCl3.
2. The Co3+ has electronic configuration t2g5eg2. Thus, electrons form t2g transit to eg.
3. The Mn and Cr are in +7 and +6 state respectively and thus have empty d orbital. Thus, no scope for d-d transition.