Washing of coal________________?
Correct answer: D. All A., B. and C.
- A. Reduces its sulphur and ash content
- B. Controls its ash fusibility and increases its calorific value
- C. Improves its coking properties
- D. All A., B. and C.
Explanation
Coal washing removes mineral matter, thereby lowering ash and some sulphur, raising calorific value, and improving coking behaviour. Removing ash-forming minerals also improves control of ash fusibility, so all three statements apply.
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