States of Matter

Identify the correct statements from the following
I. For an ideal gas, the compressibility factor is 1.0
II. The kinetic energy of NO(g)(. molar mass =30gmol−1) at T(K) is xJmol−1. The kinetic energy of N2O4(g) (molar mass =22gmol−1 ) at T(K) is 2×Jmol−1
III. The rate of diffusion of a gas is inversely proportional to square root of its density