Concept:Intermolecular distances are not the same in solids, liquids, and gases.
Explanation:Ice, water, and water vapour are different states of the same substance, but their molecular spacing is different.
In ice, molecules are held in a fixed lattice with some empty spaces between them.
In water, the molecules are packed more closely than in ice.
In water vapour, the molecules are very far apart compared with those in ice or water.
Therefore, saying that molecules of ice, water, and water vapour have equal intermolecular distances is not correct.
The other statements are true: the molecules have the same structure, the attraction between vapour molecules is much weaker than between water molecules, and water vapour is more compressible than water.
Answer:Option A is not correct.