Question

Which of the following are the properties of solid?
A. They have definite shape
B. They have distinct boundaries
C. They have fixed volume
D. All of the above.

Answer 1

Hint: Before answering this question, we must know that the intermolecular force of attraction in solids is very strong; this is the reason why there is very less intermolecular space. This is the most important characteristic of solids and is responsible for most of its physical properties.

Complete step by step answer:
We have already learned in our junior classes that solids are known for their structural rigidity and resistance to changes in shape or volume. Unlike a liquid, a solid object generally does not flow to acquire the shape of its container; neither does it expand to fill the entire volume available to it like a gas. Hence it has rigid boundaries
not susceptible to changes. The molecules in a solid are in fixed positions and are close together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume. If we try to force the molecules apart, we can change the shape and the volume of a solid by
breaking it into pieces. However, each of those pieces will still be a solid and have its own particular shape and volume.
Therefore all of the statements provided as options are correct.
Hence, the correct answer is Option (D) All of the above.

Note: We must remember that most Solids usually have their constituent particles arranged in a regular, three-dimensional array with alternating positive and negative ions called a crystal. Yet, some other solids like glass are amorphous in nature.