Question

What type of solid has the highest melting point?

Answer 1

Answer: B -Network solids

Ionic solids are held by positive and negative charged ions bonded by electrostatic forces. The electrostatic force is much stronger than dipole–dipole interactions, London dispersion forces, hydrogen bonding.

Molecular solids are held by dipole–dipole interactions, London dispersion forces, or hydrogen bonds. Benzene is an example of this. These inter-molecular force are much weaker than electrostatic force.

The metallic bonds are much weaker than electrostatic force. Similarly, in non-metallic solids the atoms are held by covalent bonds. These covalent bonds are weaker than the electrostatic force.

Thus we can conclude that electrostatic force is the strongest when compared to  dipole–dipole interactions, London dispersion forces, hydrogen bonding,covalent and metallic bonds. Thus ionic solids will have the highest melting point as more energy is required to break the ionic bonds as this is the strongest bond compared to the other bonds.

Answer 2

Answer:

The correct answer option is B. network solid.

Explanation:

A network solid has the highest melting point.

The reason being that all of the atoms in this type of solid are covalently bonded to one another so the covalent bonds must be broken throughout the substance.

These covalent bonds holding the solid together are stronger than the ionic bonds. So it means that more heat energy is needed to break these bonds and therefore a higher temperature is required for it.