Fuels and Combustion
High amount of sulphur and phosphorous in coke causes

Brittleness of steel made by using it
Increase in its strength
Decrease in its calorific value
None of these

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Fuels and Combustion
Washing of coal

All of these
Improves its coking properties
Reduces its sulphur and ash content
Controls its ash fusibility and increases its calorific value

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