Washing of coal is done to reduce the_________________?
Correct answer: D. Both B. and C.
- A. Inherent impurities
- B. Adhering impurities
- C. Mineral matter
- D. Both B. and C.
Explanation
Coal washing removes physically adhering dirt and separable mineral matter such as shale and pyrites. Inherent impurities chemically bound within the coal structure are not normally removed by ordinary washing.
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