Hydrogen and its compoundHard
Question
Which of the following compounds is expected to be coloured ?
Options
A.Ag2SO4
B.CuF2
C.MgF2
D.CuCl
Solution
In CuF2, Cu2+ has 3d9 configuration and hence coloured due to d-d transition. other cations Ag+, Mg2+ and Cu+ cannot show d-d transition as they do not have incompletely filed d-subshell.
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