A) \[C{{u}^{+}},\,\,Z{{n}^{2+}}\]
B) \[C{{u}^{2+}},\,\,Z{{n}^{2+}}\]
C) \[{{V}^{3+}},\,\,C{{r}^{3+}}\]
D) \[M{{n}^{3+}},\,\,F{{e}^{3+}}\]
Correct Answer: A
Solution :
The outer electronic configuration of all given ions are
As it is clear from outer electronic configurations of given ions that \[C{{u}^{+}}\] and \[Z{{n}^{2+}}\] do not have unpaired electrons in its valence shell, thus both are colourless.
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