In calcination __________ is used.

Excess of oxygen

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Limited oxygen

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No oxygen

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None of the above

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Solution

The correct option is B Limited oxygen
Heating of compounds like carbonate ore strongly in limited air is known as calcination. Therefore, Option $B$ is correct.

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A c a l c i n a t i o n - ----- \to C a O + M g O + 2 C O_{2}

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

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