Nitrogen dioxide is an atmospheric pollutant produced by some cars. Which of the following statements explains how the gas spreads out into the atmosphere?
A.The NO2 molecules move from an area of high concentration near the car to an area of low concentration in the atmosphere by evaporation
.B.The NO2 molecules move from an area of low concentration near the car to an area of high concentration in the atmosphere by diffusion.
C.The NO2 molecules move from an area of high concentration near the car to an area of low concentration in the atmosphere by diffusion.
D.The NO2 molecules move from an area of low concentration near the car to an area of high concentration in the atmosphere by evaporation.
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Explanation:
answer is b Nitrogen dioxide is part of a group of gaseous air pollutants produced as a result of road traffic and other fossil fuel combustion processes. Its presence in air contributes to the formation and modification of other air pollutants, such as ozone and particulate matter, and to acid rain.
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