Question

Acid rains are produced by

• A. excess $NO_x$ and $SO_2$ from burning fossil fuels
• B. excess production of $NH_3$ by industries and power plants
• C. excess release of carbon monoxide by incomplete combustion of fossil fuels
• D. excess release of $CO_2$ by combustion and animal respiration

Answer 1

Answer: (A)

excess $NO_x$ and $SO_2$ from burning fossil fuels

Answer 2

Acid rain is caused by large scale emission of acidic gases into the atmosphere from thermal power plants, industries and automobiles. The common ones are sulphur dioxide, nitrogen oxides $(NO_x)$, volatile organic carbons $(VOCs)$ and hydrogen chloride. $NO_x$ are also produced in atmosphere through lightning. Sulphur dioxide and nitrogen oxides are changed in the atmosphere into sulphuric acid and nitric acid by combining with oxygen and water.