Maximum intermolecular forces of attraction exist in
Copper
The intermolecular force of attraction: It is defined as the force of attraction which exists between molecules of a substance.
Correct option(D) Copper
Copper exists in solid form.
The Solid-state of matter has the strongest intramolecular attraction.
The atoms of solid-state material are locked together strongly.
Therefore, it can be concluded that maximum intermolecular forces of attraction exist in solid material.
And solid-state material is copper.
Incorrect options
Option(A) Bromine
Bromine exists in a liquid state.
Liquid has less intermolecular force of attraction in comparison to solids.
Option(B) Air
Air is a form of gas.
The intermolecular forces of attraction between gaseous particles are the least.
Option(C) Oxygen
It also exists as a gas and therefore intermolecular forces of attraction are the least.
Hence, option(D) is correct.