( There ( ( are ( ( ( ( attractive and ) repulsive ) forces ) ( between ( gas particles ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (ADJP (JJ attractive) (CC and) (JJ repulsive)) (NNS forces)) (PP (IN between) (NP (NN gas) (NNS particles))))) (. .)))
There are attractive and repulsive forces between gas particles.
(ROOT (S (NP (NP (NNS Particles)) (PP (IN in) (NP (NP (DT the) (NN gas) (NN state)) (PP (IN of) (NP (NN matter)))))) (VP (VBP do) (RB not) (VP (VB experience) (NP (NP (DT any) (NN force)) (PP (IN of) (NP (JJ mutual) (NN attraction) (CC or) (NN repulsion)))))) (. .)))
Particles in the gas state of matter do not experience any force of mutual attraction or repulsion.