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NEET levelSingle correct optionDifficulty 1 of 3mt004

Calcination of an ore involves heating it

  1. Astrongly below its melting point in a free supply of air
  2. Babove its melting point with coke and limestone
  3. Cwith a dilute aqueous solution of sodium cyanide
  4. Dstrongly below its melting point in the absence of air or in a limited supply of air

Answer: D

Calcination removes volatile matter such as and moisture by heating below the melting point with little or no air. Heating in excess air is roasting, heating with coke and flux is smelting, and treatment with cyanide solution is leaching.
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