AP EAMCET20225 Jul 2022Morning ShiftChemistryp Block Elements (Group 13 & 14)Actual
Identify the species, which does not exist?
Options
- A[ SiF ₆ ]²⁻
- B[ SiCl ₆ ]²⁻
- C[ GeCl ₆ ]²⁻
- D[ Sn ( OH )₆ ]²⁻
Correct answer
B. [ SiCl ₆ ]²⁻
Step-by-step solution
Presence of vacant d -orbitals in Si , Ge and Sn , makes the existence of species [ SiF ₆ ]²⁻, [ GeCl ₆ ]²⁻ and [ Sn ( OH )₆ ]²⁻ feasible. But [ SiCl ₆ ]²⁻ cannot exist as six large Cl ⁻ cannot be accomodated around Si ⁴⁺ ion due to smaller size of cation.