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In coal, Sulphur is usually present in the extent of __________

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in Engineering Chemistry II by (789k points)
In coal, Sulphur is usually present in the extent of __________

(a) 0.5-3%

(b) 90-95%

(c) 70-75%

(d) 80-85%

This question was posed to me at a job interview.

Origin of the question is Analysis of Coal topic in division Fuels and Combustion of Engineering Chemistry II

1 Answer

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Right choice is (a) 0.5-3%

Easy explanation: Sulphur is generally present in the extent of 0.5 to 3% and is usually derived from ores like gypsum, iron pyrites, etc. High percentage of sulphur in coal is undesirable to be used for making coke in the iron industry since it affects the quality and properties of steel.

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