$\begin{array}{1 1} \text{(a) The product PV for fixed amount of gas is independent of temperature.} \\ \text{(b) Molecules of different gases have same KE at a given temperature.} \\ \text{(c) The gas equation is not valid at high pressure and low temperature.} \\ \text{(d) The gas constant per molecule is known as Boltzman constant.} \end{array} $
