Question

The molecule which is not hydrolysed by water at ${25}^{o}C$ is:

• A. $AlC{l}_3$
• B. $SiC{l}_4$
• C. $B{F}_3$
• D. $S{F}_6$

Answer 1

The correct option is D $S{F}_6$

$S{F}_6$ does not have an empty d-orbital and it is surrounded by 6 fluorine atoms. Due to steric reasons $S{F}_6$​ is exceptionally stable and thus hinders the attack of water molecules.