Equation of state (EOS) Plays an important role in understanding the properties of matter under extreme conditions of pressure and temperature. In the present paper we shall consider four EOSs such as Vinet Rydberg EOS, Shanker EOS, Shanker – Kushwah EOS and Kean’s EOS to study the behavior of five solids viz Ne, Cu, Al, LiH and MgO upto very high Compressions.

Keywords: Equations of State, Bulk Modulus, Monoatomic and Diatomic Solids.