Question

Write short notes on the following:
(a) Acid rain
(b) Ductility and Malleability
(c) Micelle

Hint:

When studying properties like ductility and malleability, focus on their applications in material science and their relation to the atomic structure of metals.

Answer 1

(a) Acid Rain: Acid rain is rain that has been made acidic by pollutants such as sulfur dioxide and nitrogen oxides, which combine with water vapor in the atmosphere. This can cause harm to the environment, including damage to plant life, aquatic ecosystems, and buildings.
(b) Ductility and Malleability: Ductility refers to the ability of a material to be stretched into thin wires, while malleability refers to the ability of a material to be hammered into thin sheets. Both are properties of metals.
(c) Micelle: A micelle is an aggregate of surfactant molecules in water, with the hydrophobic tails oriented inward and the hydrophilic heads facing outward. They help in solubilizing hydrophobic substances in water, such as oils and fats.