Test: Coal & Petroleum - Class 8 MCQ

Natural resources that are always available and won't deplete are classified as inexhaustible resources. Examples include sunlight and air, which are unlimited and easily replenished by nature.

Coal is an exhaustible natural resource because it is limited in quantity and can be depleted with overuse. In contrast, sunlight and air are inexhaustible resources.

Carbonisation is the slow process through which dead plants transform into coal under high pressure and temperature over millions of years, resulting in the formation of fossil fuels.

Coke is used in the steel-making process as it serves as a reducing agent, helping in the extraction of metals from their ores.

Coal tar is a thick, black liquid made up of approximately 200 different substances, which are used in the production of synthetic dyes, medicines, and other products.

Heating coal in the presence of air produces carbon dioxide gas, which is a major greenhouse gas contributing to global warming.

Petroleum is primarily used to produce transportation fuels such as petrol and diesel, which power vehicles and machinery across the globe.

Petroleum and natural gas are formed from tiny sea organisms that died millions of years ago and were covered by layers of sand and clay, undergoing transformation under high pressure and temperature.

The first oil well drilled in Pennsylvania in 1859 marked the beginning of the modern petroleum industry, paving the way for the widespread extraction and use of oil.

Petroleum is called 'black gold' because of its high value and importance in producing a wide range of products, including fuels and petrochemicals.

CNG is a cleaner fuel alternative to petrol and diesel, producing less pollution and being easier to transport through pipelines.

Natural gas in India is predominantly found in states like Tripura and Rajasthan, as well as in the Krishna-Godavari delta.

Turning off the engine during long stops is an effective way to conserve fossil fuels, as it prevents unnecessary fuel consumption.

Burning fossil fuels releases harmful pollutants into the atmosphere, contributing to air pollution and global warming.

Coal tar is composed of various substances that are essential for producing synthetic dyes, explosives, and many other everyday items.

The refining process separates petroleum into various useful products, including fuels like petrol and diesel, lubricating oils, and other petrochemicals.

Fossil fuel use contributes to global warming due to the greenhouse gases released during combustion, highlighting the need for sustainable energy practices.

The term 'fossil fuels' signifies that these energy sources, such as coal and oil, are derived from the remains of ancient plants and animals, transformed over millions of years.