Consider the following:
- Aerosols
- Foam agents
- Fire retardants
- Lubricants
In the making of how many of the above are hydrofluorocarbons used?
(a) Only one
(b) Only two
(c) Only three
(d) All four
UPSC ANSWER : C ( May be they taken Lubricant as wrong)
- Hydrofluorocarbons (HFCs) are greenhouse gases (GHGs) commonly used by federal agencies in a wide variety of applications, including refrigeration, air-conditioning (AC), building insulation, fire extinguishing systems, and aerosols
- Hydrofluorocarbons (HFCs), which are often used in foam blowing agents
- The new synthetic lubricants have miscibility with HFC re- frigerants, such as HFC-l34a, similar to that of mineral oils with CFCs
