Question

On the basis of kinetic theory of matter :

• A. the solids have a definite volume and definite shape
• B. the liquids have a definite volume but no definite shape
• C. the gases have no definite volume and no definite shape
• D. all of the above

Answer 1

The correct option is D all of the above

(a) Why the solids have a definite volume and definite shape?
The particles that make up a solid are packed very closely together. In addition, each particle is tightly fixed in one position. This fixed, closely packed arrangement of particles causes a solid to have a definite shape and volume.
(b) Why the liquids have a definite volume and but no definite shape?
Liquid molecules are also packed closely together, but there is enough space between the molecules to allow them to slide past each other. This sliding action prevents the liquid from taking a shape of its own. As a result, liquids take the shape of the container that holds them. The particles in liquids are much farther apart than the particles in solids, and they're also moving around much more . Even though the particles are farther apart in liquids than in solids, some particles in liquids may still be near each other, clumped together in small groups. Because the particles are farther apart in liquids, the attractive forces among them aren't as strong as they are in solids which is why liquids don't have a definite shape. However, these attractive forces are strong enough to keep the substance confined in one large mass instead of going all over the place.