In the making of how many of the above are hydrofluorocarbons used? Aerosols? Foam agents? Fire retardants ? [2023]

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?

1. Only one
2. Only two
3. Only three
4. All four

Explanation

Option (c) is correct

• Hydrofluorocarbons (HFCs) are entirely human-made. They are commonly used as aerosol propellants and foam-blowing agents, and are also employed in fire protection systems as clean agents for fire suppression. However, they are not used as lubricants. While HFCs do not contribute to ozone depletion, they have global warming potentials (GWPs) that are hundreds to thousands of times higher than that of carbon dioxide.

Answer: (c) Only three; Difficulty Level: Hard