When two ice cubes are pressed over each other, they unite to form one cube. Which of the
following forces is responsible to hold them together?
(A) Covalent attraction
(B) Hydrogen bond formation
(C) van der Waals forces
(D) ionic attraction
When two ice cubes are pressed together and they fuse, the phenomenon is due to a process called regelation, which involves melting under pressure and refreezing when the pressure is released. The forces that cause the ice molecules to stick together again are:
- Hydrogen bonds between water molecules.
Water molecules in ice are held together by hydrogen bonding. When pressure melts the ice at the interface, and it refreezes, hydrogen bonds reform, causing the cubes to fuse.
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