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A.
absorbed and the reaction is endothermic
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B.
evolved and the reaction is endothermic
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C.
evolved and the reaction is exothermic
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D.
absorbed and the reaction is exothermic
Correct Answer: Option C
Explanation
The Magnesium actually reacts with oxygen in the air, is burnt and produces a bright light. The bright light emits a lot of heat so the reaction is exothermic.
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