Two molecules of a solid are kept at some distance apart, and the force between them is measured. The solid is then melted to form a liquid. Two molecules of the liquid are kept at the same distance apart, and the force between them is measured. Which force is greater?

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Force between the two molecules of solid

Force between the two molecules of liquid

Both will be equal

Cannot be determined

answer is A.

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Detailed Solution

The force between the two molecules of solid will be greater.
Solids are hard; they have a definite shape, size, and volume; they are incompressible. Their particles are tightly packed due to the strong intermolecular force of attraction. Unlike solids, liquids have a fixed volume but no fixed shape. Liquids also have the property of flowing, which indicates that their particles are loosely packed compared to solids. Therefore, the intermolecular force of attraction between the two liquid molecules will be less than that of a solid.

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