Question

Which of the following is not a correct statement ?

• A. The electron-deficient molecules can act as Lewis acids
• B. The canonical structures have no real existence
• C. Every AB5 molecule does in fact have square pyramid structure
• D. Multiple bonds are always shorter than corresponding single bonds

Answer 1

Answer: (C)

Every AB5 molecule does in fact have square pyramid structure

Answer 2

Not every AB5 molecule has a square pyramid structure. While some AB5 molecules, such as phosphorus pentachloride (PCl5), do have a square pyramid structure, others may have different structures depending on the atom involved and its geometry. For example, SF5Cl has a trigonal bipyramidal structure, not a square pyramid. The actual structure depends on the specific molecular geometry and the arrangement of atoms and lone pairs around the central atom.

So, the correct option is (C): Every AB5 molecule does in fact have square pyramid structure