A coal with high ash content___________________?
Correct answer: B. Is harder and stronger
- A. Has higher calorific value
- B. Is harder and stronger
- C. Is not subjected to washing
- D. Has low quantity of mineral matter
Explanation
Ash is mineral, non-combustible matter, so a high-ash coal has lower calorific value and greater mineral content. Such coal is commonly described as harder and stronger, making option b the intended choice.
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