Among the following, the number of compounds which do not hydrolyze
NF3,NCl3,PCl3,PCl5,CCl4,SiCl4,BiCl3,NaCl,FeCl3
NF3,CCl4,NaCl do not hydrolyze
NF3, CCl4 - does not have a vacant d-orbital
NaCl - Salts of strong acid and strong base do not undergo hydrolysis they just get solvated in the solution.
NCl3H2O→NH4OH+HOClPCl3H2O→H3PO3+HClPCl5H2O→H3PO4+HClSiCl4H2O→H2SiO3+HClBiCl3H2O→BiOCl+HClFeCl3H2O→Fe(OH)3+H++Cl−