Question

Which of the following is an incorrect statement?

• A. Multiple bonds are always shorter than the corresponding single bonds
• B. The electron deficient molecules can act as Lewis acids
• C. Canonical structures have no real existence
• D. Every $A{B}_6$ type molecule has square pyramidal structure

Answer 1

The correct option is D Every $A{B}_6$ type molecule has square pyramidal structure

Generally, $A{B}_6$ type has an octahedral geometry like $S{F}_6$ or a distorted octahedral geometry like in the case of $Xe{F}_6$. It never encounters square pyramidal type structure. The square pyramidal shape is usually observed in molecules that has 5 bond pairs and one lone pair. Eg.,$Br{F}_5$.