BioMedical Admissions Test (BMAT) 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer, which identifies the type of structure characterized by strong covalent bonds but weak intermolecular forces, is based on the distinction between types of bonding and structure.

A simple molecular structure consists of molecules formed by covalent bonds within each molecule. These bonds are indeed very strong; however, the forces that act between the individual molecules—known as intermolecular forces—are relatively weak. This property is significant because it leads to low melting and boiling points for substances like methane or water, allowing them to exist as gases or liquids at room temperature.

In contrast, a giant ionic structure is characterized by a lattice of ions held together by strong ionic bonds, rather than individual molecules with weak intermolecular forces. A giant metallic structure features strong metallic bonds between metal atoms, contributing to conductivity and malleability. Finally, a giant covalent structure, such as diamond or graphite, contains a vast network of strong covalent bonds throughout the material, leading to very high melting points and hardness, which is quite different from the behavior observed in simple molecular structures.

Understanding these distinctions is key to grasping the properties of various substances, particularly in relation to their bonding and structural characteristics.