HCFCs Have Been Developed to Replace CFCs as Refrigerants

question 33

Multiple Choice

HCFCs have been developed to replace CFCs as refrigerants.Which property of these new compounds makes them environmentally superior to CFCs?

• A)Greater reactivity leads to decomposition at elevations below the stratospheric ozone concentration maximum
• B)Lower reactivity makes them stable even in the intense ultraviolet light in the stratosphere
• C)Their higher molecular weight prevents them from reaching the stratosphere
• D)They do not contain chlorine

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Definitions:

Spontaneous Remission

The unexpected improvement or cure of a disease or condition which occurs without any conventional medical intervention.

Placebo Effect

A phenomenon where an individual experiences a perceived improvement in condition due to personal expectations, rather than the effect of an active medical treatment.

Subjective Well-Being

Someone's self-evaluation concerning their overall happiness and life fulfillment.

Epinephrine

A hormone also known as adrenaline, secreted in response to stress and increases heart rate, muscle strength, blood pressure, and sugar metabolism.