Calcination is the process of heating the ore:

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In inert gas

In the presence of air

In the absence of air or limited supply of air

In the presence of

C a O

and

M g O

answer is C.

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Detailed Solution

Concept: The process of heating a chemical or solid material under regulated conditions while regulating the temperature is known as calcination. This procedure is carried out in order to alter the substance's chemical or physical makeup.
In this method, the ores are heated in the absence or with little oxygen, resulting in the thermal breakdown of the ore. The device in use here is referred to as a calciner. It is a steel cylinder that can turn inside a furnace to perform indirect processing at high temperatures in a regulated environment. The range of the temperature is about between 550 and 115 degrees Celcius or 1000 and 2100 Fahrenheit.
Hence, the correct option is option 3.

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