______ is the process of heating the concentrated ore at a temperature below its melting point in the presence of air inorder to convert it into its oxide ore.

Calcination

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Roasting

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Electrolysis

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Leaching

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Solution

The correct option is B Roasting
Roasting is a process of heating the concentrated ore at the temperature below its melting point in the presence of air.

Sulphide ores are transformed into its oxide by this process.

For example, zinc sulphide is converted to zinc oxide by heating it in the presence of oxygen.

The reaction involved is given below:
$2ZnS(s) + {3O}_{2} (g) \to 2ZnO(s) + {2SO}_{2} (g)$

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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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