Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
Example: Earth rotates on its axis once times in one day.
Example solution: How many times does Earth rotate on its axis in one day?
Example explanation: The given output correctly poses a question based on the scientific fact given.

Problem: Particles in the gas state of matter do not experience any force of mutual attraction or repulsion.
Solution: Particles in what state of matter do not experience any force of mutual attraction or repulsion?