When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together? A. Hydrogen bond formation B. Vander waals forces C. Covalent attraction D. Dipole interaction

Hydrogen bond formation
Vander waals forces
Covalent attraction
Dipole interaction

The correct answer is: A. Hydrogen bond formation

Hydrogen bonds are weak chemical bonds that form between a hydrogen atom and a more electronegative atom, such as oxygen or nitrogen. They are responsible for the many unique properties of water, including its high surface tension, boiling point, and freezing point.

When two ice cubes are pressed together, the hydrogen bonds between the water molecules in the ice cubes form bridges between the two cubes. These bridges help to hold the ice cubes together and prevent them from sliding past each other.

The other options are incorrect because they do not provide a strong enough force to hold the ice cubes together.

  • Van der Waals forces are weak attractive forces that occur between all molecules. They are caused by the temporary dipoles that form when electrons move around in a molecule. Van der Waals forces are not strong enough to hold ice cubes together.
  • Covalent attraction is a strong chemical bond that forms when atoms share electrons. Covalent bonds are not present between water molecules, so they cannot hold ice cubes together.
  • Dipole interaction is a weak attractive force that occurs between two molecules that have opposite charges. Dipole interactions are not strong enough to hold ice cubes together.