Group 14 Elements

The main reason that is easily hydrolysed as compared to is that can extend its coord�nation number beyond four because it has vacant -orbital. On the other hand, carbon has no -orbital thus, it cannot extend its coordination number beyond four, so its halides are not attacked (hydrolysed) by water. The vacant -orbitals of can coordinate with water molecules and hence their halides are hydrolysed by water.
The hydrolysis of occurs due to coordination of - OH with empty -orbitals of Si-atom of molecule.