What is low grade brown coal called?a)Bituminousb)Anthracitec)Lignited)None of theseCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Lignite, often referred to as brown coal, is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It is considered the lowest rank of coal due to its relatively low heat content.

Answer

Carbon content in lignite is very lower than other i.e.65-70 percent . It contain greatest amount of compounds other than carbon like sulphur and mercury.Higher the content of carbon in coal greater will be the quality of that particular type of coal.

Anthracite is the greatest quality of coal as it contain 90-95 percent of carbon in it.

Answer

Lignite, often referred to as brown coal, is a soft, brown, combustible, sedimentary rock...
c is correct answer

Answer

Lignite is the correct answer for the low-grade brown coal. Lignite is a type of coal that is considered to be the lowest grade of coal due to its relatively low carbon content and energy density. It is also known as brown coal because of its brownish-black color.

Lignite is formed from the compressed and partially decayed remains of plants that lived millions of years ago in swampy environments. It is primarily composed of water, carbon, hydrogen, oxygen, and some impurities such as sulfur. Compared to other types of coal, lignite has a higher moisture content and lower carbon content, which makes it less energy-dense and less efficient as a fuel source.

Here are some key points about lignite:

1. Formation: Lignite is formed from peat, which is the earliest stage in the formation of coal. Peat is formed from the accumulation of plant debris in wetland environments. Over time, the peat is buried and undergoes physical and chemical changes, transforming into lignite.

2. Properties: Lignite has a high moisture content, typically ranging from 20% to 40%. This high moisture content makes it less efficient as a fuel source and requires additional processing to remove the moisture before it can be used. Lignite also has a lower carbon content, typically around 25% to 35%, which results in lower energy content.

3. Usage: Lignite is primarily used for electricity generation and as a fuel for industrial processes. It is commonly used in power plants that have been specifically designed to burn lignite. However, due to its lower energy content and higher emissions of carbon dioxide and other pollutants, lignite is considered to be a less environmentally friendly fuel compared to other types of coal.

4. Availability: Lignite is found in many parts of the world, including Europe, North America, and Asia. Some countries, such as Germany and Greece, have significant reserves of lignite and rely on it for a significant portion of their electricity generation.

In conclusion, low-grade brown coal is known as lignite. It is characterized by its low carbon content, high moisture content, and brownish-black color. Lignite is primarily used for electricity generation and industrial processes but is considered to be a less efficient and less environmentally friendly fuel compared to other types of coal.

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