Question

Which state has the maximum kinetic energy plasma or gases?

Answer 1

would be a gas, because they lack the intermolecular forces that hold liquids together, and the rigidity that holds solids together.

This example of water pretty much summarizes it:

http://www.scottsmithonline.com/

Solids, in general, are rigid. They are known to have a definite form, definite volume. Hence, their kinetic energy is smaller than that of loose fluids.