Q. Hydrofluorocarbons (HFCs) are used in which of the following applications?
1.As propellants in aerosol products
2.As blowing agents in foam manufacturing
3.As fire suppression agents
4.As refrigerants and lubricants in cooling systems
How many of the above applications involve the use of HFCs?
Answer: D
Notes:
Explanation:
- Aerosols –HFCs are used as propellants in aerosol sprays like deodorants, medical inhalers, etc.
- Foam agents –HFCs act as blowing agents in the production of insulating foams.
- Fire retardants – Some HFCs are used in fire suppression systems (e.g., HFC-227ea).
- Lubricants –HFCs are used in refrigeration and air-conditioning systems, where they function alongside specific lubricants to ensure compressor efficiency.
Source: Environment (N.C.E.R.T)
