How do solids, liquids and gases differ in shape and volume?

State two characteristic properties each of:

(a) A solid

(b) a liquid

(c) a gas

Why do gases have neither a fixed shape nor a fixed volume?

Arrange the following substances in increasing order of force of attraction between their particles (keeping the substance having them in imum force of attraction first):

Water, Sugar, Oxygen

Give two reasons to justify that:

(a) Water is a liquid at room temperature.

(b) An iron almirah is a solid.