Essay
Consider the oxides XO2, where X is a main-group element. Identify X in each of the following cases:
a. XO2 is a natural component of the atmosphere, implicated in global warming.
b. XO2 is a toxic, brown gas and a component of photochemical smog.
c. XO2 is a colorless, toxic gas, implicated in acid rain.
d. XO2 is network solid; one form of it is the mineral quartz.
Correct Answer:
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a. C
b. N
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Correct Answer:
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b. N
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