Compared to SF₆ with SF₄, the false statement is

Due to steric hindrance SF₆ is chemically unreactive whereas SF₄ can act as good fluorinating agent. For the same reason SF₆ do not hydrolyse in water but SF₄ hydrolyses in water. SF₆ have is symmetric octahedral in structure. So it is non–polar and thus have weak attractive forces between molecules. SF₄ has see saw shape which is unsymmetric and have dipole moment. So attractive forces between SF₄ molecules are strong causing more boiling point thanSF6. Due to unsymmetric structure the axial and equatorial bond lengths are not same in SF₄.