Consider the following: 1. Aerosols 2. Foam agents 3. Fire retardants 4. Lubricants In the making of how many of the above are hydrofluorocarbons used?
Explanation
Statement 1 is Correct: Hydrofluorocarbons (HFCs) are used as propellants in aerosol products, such as hairsprays, deodorants, and various cleaning sprays, as they are non-flammable and serve as effective carriers for the product.
Statement 2 is Correct: HFCs are widely used as foam-blowing agents in the manufacture of plastic foams (such as polyurethane and polystyrene) which are used for thermal insulation in buildings, refrigerators, and other appliances.
Statement 3 is Correct: HFCs (such as HFC-227ea) are used as fire suppressants in fire protection systems. They are often referred to as "clean agents" and were developed to replace ozone-depleting Halons in fire extinguishers and total flooding systems.
Statement 4 is Incorrect: HFCs are not used in the making of lubricants. Lubricants are typically formulated from mineral oils, synthetic hydrocarbons (like polyalphaolefins), or esters to reduce friction and wear between moving surfaces.