Coking coal is used for making iron. It was invented by Abraham Darby of England when he added to coal the right proportion of:

sulphur

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steam

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lime

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copper

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Solution

The correct option is D steam
When coal is added to right amount of steam, coking coal is produced. Coking coal is invented by Abraham Derby which was then used for manufacturing of pig iron from blast furnace.

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Similar questions

1) Abraham Darby I	A) Cast iron
2) Abraham Darby II	B) Puddling process
3) Henry Cort	C) Blast furnace
	D) Conversion of pig iron into wrought iron using smelting
	E) Coke for the furnace

1) Abraham Darby I	A) Cast iron
2) Abraham Darby II	B) Puddling process
3) Henry Cort	C) Blast furnace
	D) Conversion of pig iron into wrought iron using smelting
	E) Coke for the furnace

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