ANS:D - inversion

The temperature at which real gases behave similarly to ideal gases over a wide range of pressure is called the critical temperature. At the critical temperature, a real gas cannot be liquefied, regardless of the pressure applied. Below the critical temperature, a gas can be liquefied by increasing the pressure, but above this temperature, no amount of pressure is sufficient to cause liquefaction. This critical temperature is a fundamental property of each gas and is determined by its intermolecular forces and molecular structure. For example, the critical temperature of carbon dioxide is about 304.2 K (31.05°C or 87.89°F), while for hydrogen, it is much lower at about 33.19 K (-239.96°C or -399.93°F). So, among the options provided, the correct term is critical temperature.