In which of the following molecules are all the bonds not equal?

${\text{ClF}}_3$ exhibits $s{p}^{3}d$ hybridization with 3 bond pairs and 2 lone pairs. According to VSEPR theory, it adopts a distorted T-shape. The axial bonds experience stronger repulsions from the equatorial lone pairs and become longer and weaker than the equatorial bonds. Thus, not all bonds are equal.