Question

Which of the following is/are true on the basis of the kinetic theory of matter
A) Solids have a definite volume and definite shape
B) Liquids have a definite volume but no definite shape
C) Gases have no definite volume and no definite shape
D) All of the above

Answer 1

Hint
In solid the particles are closely packed with each other and have their fixed position.
In case of the liquid, the particles are packed together closely but space between the particle donors has a fixed position.
At the end the particle in the gases are not closely packed or we can say there is no any fixed position between the molecules in the gases

Complete step-by-step answer:
Solids have a definite volume and definite shape:
When we talk about the solid, we all know that particles in the solid are closely packed together. The position of the particle is fixed so that we can say that the solid possesses or has a definite shape.
Another reason may be that solids are bonded with ionic or metallic bonds which is enough to bond them.
Liquids have a definite volume but no definite shape:
Similarly when we are talking about the liquid, the particles in the liquid are closely packed so we can say that liquid has definite volume.
But the position of the particles are not fixed that’s why liquid does not have a definite shape.

Gases have no definite volume and no definite shape:
In gas, the molecules are bonded with weak van der waal forces therefore force of attraction between the objects are very less due to weak bonds the molecule can move freely.
And one other reason behind the indefinite shape of the gaseous molecule is that because gases have enough kinetic energy so that it can overcome the between the gaseous molecules.
Correct option is (D).

Note
If we are talking about definite shapes then we will focus on the position of the particles whether they are fixed or not and for definite volume, we focus close packing of the molecules or the particles.