Q. Which of the following species is not stable ?
A) $[SiF_6]^{2-}$
B) $[GeCl_6]^{2-}$
C) $[Sn(OH)_6]^{2-}$
D) $[SiCl_6]^{2-}$
Explanation
[Solution] Six large Cl atoms cannot fit around the small Si atom, and their lone pairs interact weakly with Si, so $[SiCl_6]^{2-}$ does not exist. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.