Multiple Choice
Which of the following statements regarding calcium is false?
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1. Intro to General Chemistry
Chemical Properties
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Which molecule commonly found in CFCs and HCFCs is primarily responsible for ozone depletion in the stratosphere?
A
H
B
F
C
Cl
D
C
Verified step by step guidance1
Understand that CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) are compounds containing carbon (C), fluorine (F), hydrogen (H), and chlorine (Cl) atoms.
Recognize that the ozone depletion in the stratosphere is mainly caused by the release of chlorine atoms (Cl) when these compounds break down under ultraviolet (UV) radiation.
Recall the mechanism: UV light breaks the C-Cl bond in CFCs/HCFCs, releasing chlorine radicals (Cl·), which then catalytically destroy ozone (O₃) molecules.
Note that while fluorine (F) and hydrogen (H) are present in these molecules, they do not play a significant role in ozone depletion compared to chlorine.
Conclude that the chlorine atom (Cl) is the key element responsible for ozone layer depletion due to its ability to catalyze the breakdown of ozone molecules.
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