Question : Which of the following statements regarding coal is not correct?
Option 1: Anthracite is the highest quality hard coal.
Option 2: Coal that has been buried deep and subjected to increased temperatures is bituminous.
Option 3: Lignite is a low-grade brown coal, which is soft with high moisture content.
Option 4: Metallurgical coal is high-grade lignite coal which has a special value for smelting iron in blast furnaces.
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Correct Answer: Metallurgical coal is high-grade lignite coal which has a special value for smelting iron in blast furnaces.
Solution : The correct answer is Metallurgical coal is high-grade lignite coal which has a special value for smelting iron in blast furnaces .
The metallurgical name that is used in the smelting of iron ore is bituminous. The highest-quality coal burns slowly generates large amounts of heat with less smoke, and its carbon content is above 80%. But its share is about 1% of global coal reserves. The different types of coal are bituminous, anthracite and lignite, in which lignite is the lowest-grade coal and anthracite is the highest-grade coal.
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