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Question
_____________ is the coal of superior quality.
_____________ is the coal of superior quality.
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Solution
The correct option is D Anthracite
Coal is classified into four main categories based on the amounts of carbon it contains and the heat energy it can produce. They are lignite, sub bituminous, bituminous and anthracite. Among these four types, anthracite is the most desirable one due to its high heat content.
Coal is classified into four main categories based on the amounts of carbon it contains and the heat energy it can produce. They are lignite, sub bituminous, bituminous and anthracite. Among these four types, anthracite is the most desirable one due to its high heat content.
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