Question

Intermolecular forces allow which of the following substances to be the least fluid?

glass
rubber
mercury
calcite

Answer 1

The correct option is calcite. It is a carbonate mineral of calcium carbonate. Its quite a hard mineral and it not fluid in nature at all. It exhibits both ionic and covalent chemical bonds.

Answer 2

Out of the options, glass is the least fluid. The proof of this also lies in the fact that glass is the most difficult to melt out of all of the mentioned substances, and melting point gives us a rough estimate of the strength of intermolecular forces.