Q. In $SiF_{6}^{2 -}$ and $SiCl_{6}^{2 -}$which one is known and why?
A) $SiF_{6}^{2 -}$because of small size of F
B) $SiF_{6}^{2 -}$because of large size of F
C) $SiCl_{6}^{2 -}$because of small size of Cl
D) $SiCl_{6}^{2 -}$because of large size of Cl
Explanation
(a)
In $SiF_{6}^{2 -}$ and $SiCl_{6}^{2 -},\ SiF_{6}^{2 -}$ is known due to the small size of F atoms. The small six F atoms can be easily accommodated around Si atom to form $SiF_{6}^{2 -}\$while in $SiCl_{6}^{2 -},\$six large$\$Cl atoms cannot e accommodated around Si atom.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.