Which one of the following types of coal contains a higher percentage of carbon than the rest ?

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Q: 124 (IAS/1999)
Which one of the following types of coal contains a higher percentage of carbon than the rest ?

question_subject: 

Geography

question_exam: 

IAS

stats: 

0,215,59,29,18,12,215

keywords: 

{'bituminous coal': [0, 1, 0, 0], 'coal': [0, 1, 2, 0], 'lignite': [3, 0, 0, 0], 'carbon': [1, 0, 4, 5], 'peat': [2, 1, 2, 2], 'anthracite': [2, 1, 2, 1], 'types': [11, 3, 20, 23], 'higher percentage': [0, 1, 1, 0]}

Among the given options, anthracite coal contains a higher percentage of carbon than the rest.

Anthracite is a type of coal that has undergone the highest level of metamorphism, resulting in a high carbon content and low moisture content. It is often referred to as "hard coal" and has the highest carbon content among all coal types, typically ranging from 86% to 98%. Due to its high carbon content, anthracite has a high energy content and burns with a clean flame and little smoke. It is considered a high-quality coal and is commonly used as a fuel for heating and in industrial processes where high heat and energy are required.

On the other hand, bituminous coal contains a lower percentage of carbon than anthracite but higher than lignite and peat. Lignite is the lowest rank of coal with the lowest carbon content, followed by sub-bituminous coal, bituminous coal, and then anthracite. Peat is an even lower rank of coal that is not fully transformed and has the highest moisture content and lowest carbon content among the types mentioned.

Therefore, anthracite coal contains a higher percentage of carbon than bituminous coal, lignite, and peat.