Final answer:
Particles in a liquid can move past each other and are not fixed in a specific arrangement, which is why a liquid has a definite volume but no fixed shape.
Step-by-step explanation:
The statement that particles in a liquid have no fixed position and can slip past one another is true. In the liquid state, particles do not have a fixed arrangement but are still attracted to each other, allowing them to move around while remaining in contact. Liquids therefore occupy a definite volume but do not maintain a definite shape, instead taking the shape of their container. Conversely, particles in a solid are held together in a fixed three-dimensional arrangement that gives the solid a definite shape and volume.