In which of the following states are the molecules always in a state of motion?
Solids
Liquids
Gases
All of these
Hence, option D is correct.
Molecules of a substance are always in a state of _________, so they possess __________ energy.
With regard to the gaseous state of matter which of the following statements are correct?
(a) The complete order of molecules (b) Complete disorder of molecules
(c) Random motion of molecules (d) Fixed position of molecules
Molecules are in a constant state of motion.