`{:(,"Coloumn-I",,"Column-II"),("(a)","At low pressure",,(p)Z=1+(pb)/(RT)),("(b)","At high pressure",,(q)Z=1-a/(V_(m)RT)),("(c)","At low density of gas",,"(r)Gas is more compressible then ideal gas"),("(d)",for H_(2) and He at 0^(@) C,,"(s)Gas is less compressible than ideal gas"):}`