Which statement about HFCs is true?

Which statement about HFCs is true?

• A. They are naturally occurring gases used in refrigeration.
• B. They have no role in refrigeration.
• C. They are used as solvents.
• D. They are man-made gases used as refrigerants.

Answer: (D)

HFCs are synthetic compounds created specifically for refrigeration needs. They were developed to replace ozone-depleting CFCs, so they are not naturally occurring. Their main use is as refrigerants in air conditioners and refrigerators, which is why describing them as man-made gases used as refrigerants is correct. The other statements don’t fit because HFCs aren’t naturally occurring, they do play a role in refrigeration, and while some HFCs can be used as solvents in certain contexts, their primary and defining use is as refrigerants.

HFCs are synthetic compounds created specifically for refrigeration needs. They were developed to replace ozone-depleting CFCs, so they are not naturally occurring. Their main use is as refrigerants in air conditioners and refrigerators, which is why describing them as man-made gases used as refrigerants is correct. The other statements don’t fit because HFCs aren’t naturally occurring, they do play a role in refrigeration, and while some HFCs can be used as solvents in certain contexts, their primary and defining use is as refrigerants.