Question

1. Fill in the blank spaces by choosing the correct words from the list given below:

List: motion, space, mass, molecule, elements, atom, shape, changes, cohesion, rigid, hard, adhesion, intermolecular

(vi) The force of attraction between similar kinds of molecules is called the force of __________.

Answer 1

• A molecule is defined as the smallest unit of matter, which has an independent existence and can retain the complete physical and chemical properties of matter.
• According to the kinetic theory of gases, the molecules always attract each other.
• The force of attraction between similar kinds of molecules is called the force of cohesion, whereas the force of attraction between different kinds of molecules is called the force of adhesion.
• Therefore, the force of attraction between similar kinds of molecules is called the force of cohesion.