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NEET CHEMISTRYP Block ElementsMedium

Question

Which of the following species is not stable?

A

[SiCl6]2-

B

[SiF6]2-

C

[GeCl6]2-

D

[Sn(OH)6]2-

Step-by-Step Solution

The [SiCl6]2- ion is not known to exist or is highly unstable. This is primarily due to steric hindrance; six large chloride ions cannot be easily accommodated around a relatively small silicon atom. Additionally, the interaction between the lone pairs of the chloride ions and the vacant 3d orbitals of silicon is weak. On the other hand, [SiF6]2- is stable because fluorine atoms are much smaller and highly electronegative.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from P Block Elements. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYP Block Elementsfollowingspeciesstable

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