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AP EAMCET202124 Aug 2021Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following species do not exist?

Options

  1. A[ SiF ₆ ]²⁻
  2. B[ SiCl ₆ ]²⁻
  3. C[ GeCl ₆ ]²⁻
  4. D[ SiF ₅ ]⁻

Correct answer

B. [ SiCl ₆ ]²⁻

Step-by-step solution

[ SiCl ₆ ]²⁻ does not exist. The chlorine atom is much larger than fluorine which does not allow the six Cl atoms to surround the silicon due to repulsion between Cl atoms. Hence, due to interelectronic repulsions between Cl atoms, the compound is unstable and does not exist.

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