Chemical Bonding

which of the following $$\pi-$$ molecular orbital-energy diagrams is correct for?
The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :
Which of the following can be classic as a Bronsted base?
The space model which is obtained by joining the points representing various bonded atoms gives the shape of the molecule. The geometry of the molecule is definite relative arrangement of the bonded atoms in a molecule. The shape and geometry of a molecule is explained by valence shell electron pair repulsion theory given by Gillespie and Nyholm.
Atomic number of the four elements A, B, C and D are respectively Z -1, Z, Z+1 and Z + 2. If Z = 9, what is type of bonding between :