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प्रश्न
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
विकल्प
Smelting
Ore dressing
Calcination
bessemerisation
उत्तर
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as calcination.
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