MCQ Detailed View

Matter can exist in different physical states, and each state has unique characteristics based on how its particles are arranged and how they move. The state of matter that has a definite shape and a definite volume is the solid state.

In a solid, the particles are closely packed together in a fixed arrangement. The strong intermolecular forces of attraction keep the particles locked in place, which is why solids maintain their shape and volume. Even if a solid is transferred from one container to another, it retains its original form. For example, an ice cube remains cube-shaped whether placed in a bowl, a glass, or on a table.

This is different from liquids, which have a definite volume but no fixed shape. Liquids adjust their shape according to the container they are placed in. For instance, water poured into a bottle takes the shape of the bottle but keeps the same volume.

Gases, on the other hand, have neither a definite shape nor a definite volume. They expand freely to fill the entire container and can be compressed easily due to the large spaces between their particles.

The definite shape and volume of solids come from their rigid particle structure. The particles in solids can only vibrate about fixed positions but cannot move freely. This restricted motion explains why solids are generally hard, stable, and resistant to compression.

Common examples of solids include wood, metal, stone, and ice. These materials keep their form and do not flow or spread out like liquids and gases.

Therefore, the correct answer is Solid, because among all three classical states of matter, only solids possess both a definite shape and a definite volume. This concept is a fundamental principle in Physics and helps in understanding the behavior of matter in different conditions.