Final answer:
The correct answer is option 1) CO₂. Carbon dioxide is the least miscible in oil out of the options provided.
Step-by-step explanation:
Miscibility in oil is an important property for refrigerants as it influences the efficiency and the functioning of refrigeration systems. CO₂ is known to be relatively immiscible in oil compared to the other refrigerants listed.The least miscible refrigerant in oil among the options is 1) CO₂, due to its nonpolar molecular structure, which makes it distinct in terms of miscibility with lubricants.
Carbon dioxide, as a refrigerant, is gaining prominence due to its low environmental impact and non-toxicity. However, because of its small, nonpolar molecular structure, it is not as soluble in oils as other refrigerants. This property makes CO₂ quite distinct when considering its miscibility with lubricants in refrigeration systems.
Refrigerants are substances used in refrigeration systems to transfer heat and cool down the surroundings. In this case, the question asks for the refrigerant least miscible in oil, which refers to the ability of the refrigerant to mix or dissolve in oil.Carbon dioxide (CO₂) is the refrigerant least miscible in oil compared to the other options mentioned in the question (R-12, R-40, and R-141). Oil and CO₂ are immiscible because they have different chemical properties and do not form a homogenous mixture.