here we gonna discuss here about very important question why do solids have a definite volume class 12 intext questions , fixed shape ?
For definite volume and fixed shape , strong attraction force and fixed position of constituent particles (atom, molecule & ions) are required.
Now come to our question’s answer.
The position of atom, molecule & ions (constituent particles) is fixed because the constituent particles are bounded by strong attraction force , that is why the particles of solids are not able to move from one place to another place. due to this attraction force between the particles the particles are fixed by their position that is the condition of solids to contain definite volume and fixed shape.
Due to this fixed position of constituent particles , when some external force or pressure is applied on solids , their particles can’t be move , because they are bounded by strong force of attraction between particles. so we can say that solids have a definite volume and fixed shape.