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

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Assertion (A) : SiF62−{SiF}_6^{2-} is known but SiCl62−{SiCl}_6^{2-} is not known.

Reason (R) : Interaction of FF lone pair electrons with Si{Si} is stronger than that of chlorine and due to smaller size of F{F} steric repulsion will be less.
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Correct option: A
Both A\mathbf{A} and R\mathbf{R} are true and R\mathbf{R} is the correct explanation of A\mathbf{A}.
Option A is correct because both the assertion and the reason are true, and the reason correctly explains why SiF62−{SiF}_6^{2-} exists while SiCl62−{SiCl}_6^{2-} does not, relating to the interaction of lone pairs and steric hindrance.

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