Notes and Study material for Exams
Minerals Minerals are defined as solid, inorganic, naturally occurring substances with a definite chemical formula and general structure. Almost all chemical Elements in the Earth’s crust are associated with at least one mineral. They vary in color, hardness, density, crystal form, crystal size, transparency, composition, location, and abundance. Some minerals are radioactive (uranophane), while others … Read more
Soil is defined as upper layer of the earth composed of loose surface material. It is a mixture of many substances including endless variety of Minerals, remnants of Plants and animals, water and air. It is the end product of continuing interaction between the parent material, local Climate, plant and animal organisms and elevation … Read more
What is a Fuel Cell? A fuel cell is an electrochemical device that converts chemical energy from a fuel into electrical energy and heat. Fuel cells are similar to batteries in that they both convert chemical energy into electrical energy, but fuel cells do not run down and need to be recharged. Instead, they can … Read more
The Earth Beneath Our Feet: A Journey Through the World of Soil Types The ground beneath our feet, often taken for granted, is a complex and dynamic ecosystem teeming with life. Soil, the foundation of our food systems and a crucial component of the Earth’s biosphere, is far more than just dirt. It’s a living, … Read more
The Silent Threat: Understanding and Managing Saline Soils Saline soils, characterized by high concentrations of soluble salts, pose a significant threat to agricultural productivity and environmental sustainability. This silent threat, often overlooked, can severely impact crop yields, degrade soil health, and even lead to land abandonment. Understanding the causes, consequences, and management strategies for saline … Read more
Metal In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic Bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. The metals are one of the three groups of Elements as distinguished by their ionization and bonding properties, along … Read more
Acid An acid is a substance which forms H+ ions as the only positive ion in aqueous solution. Examples:- Hydrochloric acid dissolved in water forms H+ and Cl– ions HCl —> H+ + Cl– Sulphuric acid dissolved in water forms H+ and SO42- ions H2SO4 —>2H+ + SO42- Nitric acid forms H+ and NO3– ions when dissolved in water HNO3 —> H+ + NO3– … Read more
Fuel Cells: The Future of Energy? Fuel cells are electrochemical devices that convert the chemical energy of a fuel, typically hydrogen, into electrical energy through a chemical reaction. Unlike batteries, which store energy, fuel cells continuously generate electricity as long as fuel and oxidant are supplied. This technology holds immense potential for a cleaner and … Read more