The yellowish colour of photochemical smog is due to the presence of:
Correct answer: A. Nitrogen dioxide
- A. Nitrogen dioxide
- B. Dinitrogen trioxide
- C. Nitrous oxide
- D. Nitric oxide
Explanation
Explanation:The yellowish color of photochemical smog is primarily due to the presence of nitrogen dioxide (NO2), which is a brownish-yellow gas. Dinitrogen trioxide (N2O3) and nitric oxide (NO) are also nitrogen oxides, but they donot contribute significantly to the color of photochemical smog. Nitrous oxide (N2O) is a different compound that is not typically present in photochemical smog.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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Atmospheric pollution covers harmful gases and particles released by vehicles, industries, burning fuels and natural sources. It includes carbon monoxide, sulfur and nitrogen oxides, particulate matter, smog, acid rain, the greenhouse effect and ozone depletion, along with their causes, chemical reactions, environmental effects and control methods.
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