NEET UG CHEMISTRY MCQ: 14 TH GROUP ELEMENTS (P-BLOCK)

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Which of the following species is not stable?

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Correct option: D

{[SiC{l_6}]^{2 - }}

Option D (

{[SiC{l_6}]^{2 - }}

) is correct because silicon cannot expand its coordination number beyond 4 due to the absence of available d-orbitals, making

{[SiC{l_6}]^{2 - }}

unstable.

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