VBT#!#type of overlapping

The type of overlapping in Br-F bond in BrF_(1) molecule is

The type of overlapping in Br-F bond in BrF_3 molecule is

Which type of overlapping results in the formation of a pi bonds

Which type of overlapping reusults in the formation of a pi bond?

What type of overlapping take place in a sigma and a pi bond?

When the atomic orbitals overlap in such a way that their axis remain parallel to each other and perpendicular to the intermolecular axis this type of overlapping results the formation of

According to VBT any covalent bond will be formed by overlapping of atomic orbitals of bonded atoms provided atomic orbitals must be half-filled and electrons be in opposite spin. According to type of overlapping covalent bonds can be classified as (a) sigma -bond (b) pi -bond (c ) delta -bond : Which of the following set of orbitals does not produce nobal plane in xz-plane ?