Acid rain is due to air pollution by

The correct answer is Nitrous oxide and Sulphur dioxide.

Key Points

• Acid Rain:-
  • ​Acid rain is the rainfall that has been acidified.
  • It is formed when oxides of sulfur and nitrogen react with the moisture in the atmosphere.
  • It is rain with a pH of less than 5.6.
  • Acid rain is particularly damaging to lakes, streams, and forests and the plants and animals that live in these ecosystems.

Important Points

• Sources of compounds causing acid rain:-
  • Natural sources:-
    • Seas and oceans,
    • volcanic eruptions,
    • Biological processes in the soil e.g., Decomposition of organic matter.
  • Man-made sources:-
    • Burning of coal (60% of SO2) and
    • Petroleum products (30% of SO2), and the smelting of metal sulfide ores to obtain the pure metals.
    • Industrial production of Sulfuric acid in metallurgical.
    • Chemical and fertilizer industries.
  • Natural sources:-
    • Lightening,
    • volcanic eruption.
    • Biological activity.