Question

Write any molecule in which octrct rule is violated

Answer 1

 commonly makes only threecovalent bonds, resulting in only six valence electrons around the B atom. A well-known example is BF 3: The third violation to the octet rule is found in those compounds with more than eight electrons assigned to their valence shell. These are called expanded valence shell molecules.

Answer 2

They are PCl5, SF6, IF7.