CAPE Chemistry Unit 2 · 2014 · Paper 1 · Question Q40
Items 40-41 refer to the following information.
Aerosol propellants such as Freon-11, \text{CCl}_3\text{F}, are of major concern because of their photochemical reaction with ozone, \text{O}_3. Ultraviolet radiation in the stratosphere produces chlorine radicals, which then react with ozone, producing oxygen.
A balanced equation for the production of oxygen from ozone is
- (A)
\text{O}_3(\text{g}) + \text{Cl}^\bullet(\text{g}) \rightarrow \text{O}(\text{g}) + \text{ClO}_2^\bullet(\text{g}) - (B)
\text{O}_3(\text{g}) + \text{Cl}^\bullet(\text{g}) \rightarrow \text{ClO}^\bullet(\text{g}) + \text{O}_2(\text{g}) - (C)
\text{O}_3(\text{g}) + \text{Cl}^\bullet(\text{g}) \rightarrow \text{O}(\text{g}) + \text{ClO}_2^\bullet(\text{g}) - (D)
\text{O}_3(\text{g}) + \text{Cl}^\bullet(\text{g}) \rightarrow \text{O}_2(\text{g}) + \text{ClO}^-(\text{g})
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