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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry1 Mark
MCQ
Acid precipitation is now regarded as a serious problem in some European and Asian countries. Its major cause or source is :
  • A
    The discharge of acidic effluents onto neutral or slightly alkaline land where the acidic components precipitate.
  • ✓
    Emission of sulfur oxides and nitrogen oxides from thermal power plants and burning of fossil fuels. These oxides dissolve in atmospheric water vapor and fall back on earth as acid rain.
  • C
    Natural carbon dioxide released during respiration of living organisms dissolves in water, forming carbonic acid which is the chief contributor to acidity in rainwater.
  • D
    None of the above.
✓

Answer

Correct option: B.
Emission of sulfur oxides and nitrogen oxides from thermal power plants and burning of fossil fuels. These oxides dissolve in atmospheric water vapor and fall back on earth as acid rain.
Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions or low $\ce{pH}$. it can have harmful effects on plants, aquatic animals, and infrastructure. It is a result of air pollution. When oxides of sulfur or nitrogen react with water sulfuric acid or nitric acid is formed.

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