The forces of attraction between the particles of a gas is minimum, intermediate in case of a liquid and are maximum in a solid.

(i) Oxygen is a gas, the forces of attraction between its particles will be the weakest.

(ii) Water is a liquid. The forces of attraction between its particles will be stronger than that of oxygen but will be weaker than that of sugar.

(iii) Sugar is a solid. The forces of attraction between its particles will be the strongest.

Thus, the increasing order of forces of attraction between the particles of water, sugar and oxygen will be:

oxygen < water < sugar