What is a common feature of both CFCs and HCFCs as refrigerants?

• A. High flammability
• B. Low toxicity
• C. High cost
• D. Solvent properties

Answer: (B)

Both chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are known for their relatively low toxicity to humans. This characteristic allows them to be handled with a degree of safety during normal applications in refrigeration and air conditioning systems. While precautions are still necessary when working with any refrigerant, the low toxicity of CFCs and HCFCs makes them less hazardous compared to other categories of chemicals that might be used in these systems.

In contrast, other potential answers like high flammability or high cost do not apply to CFCs and HCFCs. In fact, these refrigerants are generally non-flammable, which is an important property for their use in various applications. Regarding solvent properties, while both compounds may have some solubility characteristics, they are not typically utilized as solvents in applications outside refrigeration. Therefore, the defining feature of low toxicity stands out as a common aspect of both CFCs and HCFCs.