__________ is the process of heating concentrated ore in the absence of air.

Smelting

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Calcination

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Roasting

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Electrolysis

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Solution

The correct option is B Calcination
Calcination is the process of heating a concentrated ore in the absence of air to a temperature that is insufficient to melt the ore.
The process of removing earthly impurities from the ore is known as concentration of ore. This concentrated ore is converted into metal oxide by calcination or roasting.

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2 F e_{2} O_{3} . 3 H_{2} O C a l c i n a t i o n - ------ \to A + 3 H_{2} O

A

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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