Aciid rain is chiefly due to atmopheric pollution by

Options

A. `SO_(2)`
B. `H_(2)S`
C. HCl
D. `N_(2)`

Answer

A

Explanation

Acid rains refers to a mixture of deposited material, both we and dry, coming from the atomosphere containing more than normal amounts of nitric and sulfuric acids. It is easily defined as rain, fog, sleet or snow that has been made acidic by pollutants in the air as result of fossil fuel and industrial combustions that mostly emits nitrogen oxides (NOx) and sulfur dioxides `(SO_(2))`. Acidity is determined on the basis of the pH level of the water droplets. Normal rain water is slightly acidic with a pH range of 5.3 - 6.0, because carbon dioxide and water present in the air react together to form carbonic acid, which is a weak acid. When the pH level of rain water falls below this range, it becomes acid rain.