Actual Questions with 100% Correct Verified
Answers/ Graded A+
1. What does the acronym "CFC" stand for in the context of
environmental science and HVAC?
A) Carbon Fluorine Compound
B) Chlorofluorocarbon
C) Carbonated Fluorine Chemical
D) Chlorinated Fluorine Compound
Answer: B
Rationale: CFC stands for Chlorofluorocarbon, a class of organic
compounds that contain carbon, chlorine, and fluorine atoms .
These compounds are non-toxic and non-flammable, which
historically made them popular in various industrial applications.
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,2. Which of the following is a primary characteristic of CFCs
that made them widely used in refrigerants?
A) High reactivity with ozone
B) Non-toxicity and non-flammability
C) Low heat absorption capacity
D) Biodegradability
Answer: B
Rationale: CFCs are characterized by their non-toxic, non-
flammable properties, which made them ideal for applications
like refrigerants, solvents, and aerosol propellants . Their
chemical stability was initially seen as an advantage but later
became the source of their environmental harm.
3. CFCs are used in which of the following applications?
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,A) As fuel for aircraft
B) As refrigerants in air conditioning and refrigeration systems
C) As repairers of the ozone layer
D) As a source of oxygen
Answer: B
Rationale: CFCs are used as refrigerants, aerosol propellants,
and solvents . They were historically used in refrigerators, air
conditioners, spray cans, and foam products. The unique
properties of CFCs—being non-flammable and relatively non-
toxic—made them ideal for these industrial applications.
4. Which chemical property of CFCs contributed most to their
environmental impact?
A) Their high flammability
B) Their chemical inertness and stability
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, C) Their rapid biodegradation
D) Their high water solubility
Answer: B
Rationale: The chemical inertness and stability of CFCs allowed
them to remain intact in the atmosphere for decades, eventually
reaching the stratosphere where they could participate in ozone-
depleting reactions . This stability, once considered beneficial,
became the primary contributor to their environmental impact.
5. The common name "Freon" refers to:
A) A type of hydrocarbon
B) A brand name for CFC refrigerants
C) An ozone-repairing agent
D) A greenhouse gas only
Answer: B
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