Question

Which of the following has a square pyramidal shape?

• A. PCI5
• B. BrF5
• C. PF5
• D. [Ni(CN)4]2-

Answer 1

Answer: (B)

BrF5

Answer 2

$BrF_5$ (Bromine pentafluoride) has a square pyramidal shape. This is because it has five regions of electron density around the central bromine atom, with one being a lone pair of electrons, resulting in a square pyramidal molecular geometry.
$BrF_5$ has 1 lone pair and 5 bond. Therefore, geometry is octahedral, shape is square pyramidal.

So, the correct option is (B): BrF5