Final answer:
B. Weaker
Equatorial-equatorial repulsions are weaker than axial-equatorial repulsions due to the spatial arrangement in molecular geometries like the trigonal bipyramidal structure where equatorial positions are further apart.
Step-by-step explanation:
In chemistry, especially when discussing molecular geometry, equatorial-equatorial repulsions are weaker than axial-equatorial repulsions. This is because of the geometry of molecules like the trigonal bipyramidal arrangement.
In this arrangement, the equatorial positions are further apart compared to the axial positions, which are closer to the equatorial positions. Therefore, due to the electrostatic principles that the closer the charges or electron groups are, the stronger the repulsion, we can conclude that equatorial-equatorial repulsions which are further apart are weaker.
So, in response to the question, Equatorial-equatorial repulsions are weaker than axial-equatorial repulsions, making the correct answer B. Weaker.