A) \[Zn{{(N{{O}_{3}})}_{2}}\]
B) \[LiN{{O}_{3}}\]
C) \[Co{{(N{{O}_{3}})}_{2}}\]
D) \[Mg{{(N{{O}_{3}})}_{2}}\]
Correct Answer: C
Solution :
The aqueous solution of\[Co{{(N{{O}_{3}})}_{2}}\]will be pink coloured. The colour is due to the presence of unpaired d-electrons which absorb light from the visible part and thus, move to high energy levels.
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