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Ozone depletion and greenhouse effect
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ev066
Which of the following is a proposed replacement for CFCs that contains no chlorine?
A
CF
X
2
Cl
X
2
B
CCl
X
4
C
Hydrofluorocarbon such as
CH
X
2
FCF
X
3
D
CHCl
X
3
Answer: C
Hydrofluorocarbons contain only C, H and F, so they cannot supply chlorine atoms to the stratosphere. The other three compounds contain chlorine.
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