The main use of chlorofluorocarbons is in .
-
A.
vehicles
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B.
chimneys
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C.
smog
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D.
refrigerants
Correct Answer:
D. refrigerants
Explanation:
The primary application for chlorofluorocarbons (CFCs) is as refrigerants in cooling systems like refrigerators and air conditioners. Developed in the late 1920s as a safer, nontoxic, and nonflammable alternative to dangerous gases like ammonia and sulfur dioxide, CFCs became the industry standard for heat transfer. Beyond refrigeration, they have also been extensively used as propellants in aerosol sprays, blowing agents for foam plastic manufacturing, and specialized cleaning solvents for electronics. Under the Montreal Protocol, their use has been phased out due to their significant role in depleting the stratospheric ozone layer.
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