Correct Answer - Option 2 :
SO2 and NO2
The correct answer is SO2 and NO2.
- Acid rain is caused by an increase in the atmospheric concentration of SO2 and NO2.
- These mix with water vapour to form sulphuric acid (H2SO4 ) and nitric acid (HNO3) respectively which falls on the earth in the form of acid rain.
- When the pH value of regular rainwater goes around 5.7, we call it acid rain.
- The oxides of nitrogen and sulfur are blown away by the wind along with the dust particles.
- They settle on the earth’s surface after coming down in the form of precipitation.
Sulfur dioxide and nitrogen dioxide undergo oxidation, and then they react with water resulting in the formation of sulphuric acid and nitric acid respectively.
Effects of Acid Rain
Acid rain is very harmful to agriculture, plants, and animals.
Acid rain affects agriculture by the way how it alters the composition of the soil.
Acid rain causes the corrosion of water pipes, buildings, and monuments made up of stones and metals.