Coal

Inexhaustible resources are those that are available in unlimited quantities and cannot be depleted by human use; sunlight is continuously available and renewable.

Fossil fuels are exhaustible because they exist in limited quantities and take millions of years to form, making them non-renewable on a human timescale.

Destructive distillation of coal in the absence of air produces multiple valuable products: coke, coal tar, and coal gas, each with distinct industrial uses.

Coke is a hard, porous, high-carbon residue that burns with little smoke, making it an efficient fuel for industrial processes like steel manufacturing.

Coal tar is a viscous black liquid containing thousands of chemical compounds that serve as raw materials for dyes, plastics, medicines, and other industrial products.

Coal gas, primarily composed of hydrogen, methane, and carbon monoxide, was historically used for lighting and heating and still serves as an industrial fuel.

Petroleum is a complex mixture of hydrocarbons—compounds made entirely of hydrogen and carbon atoms—along with small amounts of other elements like sulfur and nitrogen.

Fractional distillation separates petroleum components based on their different boiling points; lighter fractions vaporize and condense at lower temperatures.

Diesel has a higher energy density and is used in compression-ignition engines found in trucks, buses, trains, and generators.

ATF, also known as jet fuel, is a specialized kerosene-based fuel refined to perform reliably under the extreme temperature and altitude conditions of jet engines.

Bitumen, also called asphalt, is a thick, sticky residue from petroleum refining that binds aggregates in road construction and provides waterproofing for roofs.

Wood is a biomass fuel that can be replenished over years or decades, whereas fossil fuels formed from ancient organic matter over millions of years.

Natural gas consists predominantly of methane (CH₄), a simple hydrocarbon, along with smaller amounts of ethane, propane, and other gases.

CNG is simply compressed natural gas; it is not commonly known by any other name and is distinct from LPG (liquefied petroleum gas).

Natural gas is the primary feedstock for producing ammonia through the Haber process, which is then used to manufacture nitrogen-based fertilizers.

Petrochemicals are chemical products derived from petroleum and natural gas; paraffin wax, diesel components, and plastics all originate from these sources.

Ancient plants captured solar energy through photosynthesis; when these plants transformed into coal and petroleum over millions of years, that stored solar energy was preserved.

In blast furnaces, coke reduces iron ore to metallic iron by removing oxygen, making it essential in steel manufacturing.

CNG combustion produces fewer pollutants like carbon monoxide, nitrogen oxides, and particulate matter compared to petrol, significantly reducing vehicle emissions.

Naphthalene is a white crystalline solid obtained from coal tar distillation; it sublimes to produce vapors that repel moths and insects.

Cracking breaks down large, heavy hydrocarbon molecules into smaller, lighter ones like petrol and diesel, increasing the yield of valuable fuels.

Carbonisation is the slow transformation of plant matter into coal under high pressure and temperature over millions of years, with progressive carbon enrichment.

Kerosene, a medium-weight petroleum fraction with a boiling point between petrol and diesel, is widely used as a household fuel for cooking and lighting.

Toluene from coal tar is used to produce trinitrotoluene (TNT), a common military explosive, through nitration reactions.

PCRA is a government organization in India that promotes fuel conservation through awareness campaigns and research initiatives.

Digboi in Assam is where the first oil well in India was drilled in 1889, and it remains home to one of the oldest operating refineries in the world.

Exhaustible resources exist in finite quantities that can be depleted through human consumption, as they form far slower than they are used.

Petroleum ether is a light hydrocarbon solvent used in dry cleaning to dissolve grease and oils from fabrics without damaging the material.

Burning fossil fuels releases pollutants including carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter, contributing to smog, acid rain, and climate change.

Carbon is the primary constituent of coal, with its percentage increasing from lignite to anthracite as the coal matures.

Paraffin wax is versatile: it forms candles, blends into petroleum jelly (Vaseline), and serves as a base for pharmaceutical ointments and cosmetics.

Mumbai High, discovered in 1974 off the coast of Maharashtra, is India’s largest offshore oil field and accounts for a significant portion of domestic production.

Natural gas burns more completely than coal or petroleum, producing less carbon dioxide per unit of energy and minimal sulfur dioxide and particulate emissions.

Petrol (gasoline) is a light hydrocarbon fraction with high volatility, making it suitable for spark-ignition engines in light motor vehicles.

Refining is the overall process of purifying crude petroleum by removing impurities such as sulfur, water, and salts before separating it into useful fractions.

Ethyl mercaptan is an odorant added to odorless LPG so that gas leaks can be detected by smell, allowing prompt action to prevent fire or explosion.

Coal gas is obtained from coal through destructive distillation, not from petroleum refining; lubricating oil, asphalt, and fuel oil are petroleum products.

LPG stands for Liquefied Petroleum Gas, a mixture of propane and butane that is stored under pressure in liquid form.

Fossil fuels are finite resources; their extraction is costly, combustion causes environmental pollution, and their depletion threatens energy security for future generations.

Phenol from coal tar is used to synthesize salicylic acid, a key precursor in the production of acetylsalicylic acid (aspirin).

Conservation involves responsible and efficient use of resources to minimize waste and ensure their availability for future generations.

Petroleum jelly, or Vaseline, is a semi-solid mixture of hydrocarbons obtained from the refining of petroleum, primarily from the heavier fractions.

Petroleum formed mainly from the remains of microscopic marine organisms called plankton (both phytoplankton and zooplankton) that settled on ancient sea floors.

LPG is stored in liquid form under moderate pressure in cylinders; it vaporizes upon release for easy ignition in cooking appliances.

Lubricating oil reduces friction, forms a protective film that prevents rust, and helps dissipate heat from engine and machinery components.

Anthracite is the highest rank of coal, containing over 86% carbon, with a hard texture, high energy density, and clean-burning properties.

Coke acts as a reducing agent in steel production and its porous structure makes it effective for filtering and purifying water.

Fossil fuels derive their name from their origin—the compressed and transformed remains of prehistoric organisms preserved as fossils over geological time.

Proper maintenance ensures efficient combustion, idling wastes fuel, and correct tyre pressure reduces rolling resistance—all contributing to fuel conservation.

Petrochemicals serve as fundamental building blocks for a vast range of products, including agricultural fertilizers, synthetic textiles, plastics, and countless other materials.