Which ion is not coloured [DPMT 2001] – McqOptions

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1.	Which ion is not coloured [DPMT 2001]
A.	\[C{{r}^{3+}}\]
B.	\[C{{o}^{2+}}\]
C.	\[C{{r}^{2+}}\]
D.	\[C{{u}^{+}}\]
Answer» E.

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