____is the process of heating the ore strongly in the absence of air or oxygen.

Roasting

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Smelting

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Calcination

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Thermite process

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Solution

The correct option is C Calcination
Calcination is a pyrochemical process of thermal treatment in the absence or limited supply of air or oxygen applied to ores and other solid materials to bring about a thermal decomposition.

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Calcination is a process in which ore is heated in the absence of air. As a result of which the ___ ore is converted into its oxide.

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