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A caking coal is one that on heating

  • A.softens and fuses into a coherent mass
  • B.crumbles to a fine powder
  • C.burns without leaving any residue
  • D.releases its moisture without any other change

Answer: A

The particles agglomerate as the volatiles are driven off, which blocks the air passages of a grate but is exactly what coke making requires. A coking coal is a caking coal whose residue is hard and strong enough for the blast furnace.

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