Final answer:
The correct answer is a) explode when mixed with air or oxygen. R-410A is a blend of hydrofluorocarbons (HFCs) and is dangerous to use oxygen or compressed air for leak-checking.
Step-by-step explanation:
The correct answer is a) explode when mixed with air or oxygen. R-410A is a type of refrigerant that is commonly used in air conditioning systems. It is a blend of hydrofluorocarbons (HFCs) and has a high pressure. When R-410A is mixed with air or oxygen, it can lead to a highly flammable and explosive mixture, making it dangerous to use oxygen or compressed air for leak-checking hardware.
It is important to use proper leak-checking methods and equipment, such as using a refrigerant leak detector, to ensure safety and avoid any accidents or potential explosions.