Which of the following is NOT a property of an ideal refrigerant?

An ideal refrigerant is characterized by certain properties that enhance its performance in refrigeration cycles. Among these properties, low toxicity is crucial for safety, as refrigerants are often used in environments where human exposure is possible. Low cost is also desirable, as it makes the refrigerant economically viable for widespread use. Low viscosity is important because it allows for easier circulation through the system, leading to improved efficiency.

In contrast, having a high boiling point is not a desirable property for an ideal refrigerant. An ideal refrigerant should ideally have a suitable boiling point that allows it to vaporize and absorb heat at the temperatures at which the refrigeration cycle operates. A refrigerant with a high boiling point may not vaporize adequately at low temperatures, leading to inefficient refrigeration performance. This makes it less effective in its role within cooling systems. Therefore, a low or moderate boiling point is preferred to ensure that the refrigerant can easily transition from liquid to gas, facilitating efficient heat exchange.