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Environmental chemistry (CFCs): In which common household products were chlorofluorocarbons (CFCs) historically used? Consider domestic applications before bans/restrictions due to ozone depletion concerns. Choose the correct application set.

Difficulty: Easy

Correct Answer: Refrigerators and air conditioners (as refrigerants) and aerosol spray propellants

Explanation:


Given data

  • Compound class: Chlorofluorocarbons (CFCs).
  • Ask: Household/domestic uses prior to phase-out.


Concept/Approach
CFCs (e.g., CFC-11, CFC-12) were widely used as refrigerants in refrigerators/air-conditioners and as propellants in aerosol sprays and foam blowing agents, before being phased out under the Montreal Protocol due to ozone depletion.


Final Answer
Refrigerators and air conditioners (as refrigerants) and aerosol spray propellants

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