Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Air Pollution is the contamination of air by harmful substances such as chemicals, particulate matter, or biological materials that cause harm to humans and the environment.
Major pollutants include Carbon monoxide (), Nitrogen oxides (), Sulfur dioxide (), and Chlorofluorocarbons ().
The Greenhouse Effect is the process where gases like and trap the sun's heat in the atmosphere. An increase in concentration leads to Global Warming.
Acid Rain is formed when pollutants like and react with water vapor () in the atmosphere to form Sulfuric acid () and Nitric acid ().
The Ozone layer () in the stratosphere protects Earth from harmful Ultraviolet (UV) radiation. It is depleted by used in refrigeration and aerosols.
Incomplete combustion of fossil fuels produces Carbon monoxide (), a highly poisonous gas that reacts with hemoglobin to form carboxyhemoglobin, reducing the oxygen-carrying capacity of blood.
📐Formulae
💡Examples
Problem 1:
Explain how sulfur dioxide emitted from factories contributes to the damage of historical monuments like the Taj Mahal.
Solution:
(Sulfurous acid) and subsequent oxidation to .
Explanation:
Sulfur dioxide () reacts with water vapor and oxygen in the air to form Sulfuric acid (). When it rains, this acid falls as 'Acid Rain'. It reacts with the calcium carbonate () of the marble, causing it to corrode and yellow, a phenomenon known as 'Stone Cancer'.
Problem 2:
Why is it dangerous to sleep in a closed room with a coal fire burning?
Solution:
Explanation:
In a closed room, oxygen () supply is limited, leading to the incomplete combustion of coal which produces Carbon monoxide (). is a colorless, odorless gas that binds with hemoglobin in the blood more strongly than oxygen, leading to suffocation and potentially death.