A) \[{{[SnC{{l}_{6}}]}^{3-}}\]
B) \[{{[GeC{{l}_{6}}]}^{2-}}\]
C) \[{{[SiC{{l}_{6}}]}^{2-}}\]
D) \[{{[CC{{l}_{6}}]}^{2-}}\]
Correct Answer: D
Solution :
Carbon atom cannot expand its valency shell due to non availability of d sub shell, so \[{{[CC{{l}_{6}}]}^{2}}\] does not exist.
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