When Magnesium reacts with oxygen, heat is
- absorbed and the reaction is endothermic
- evolved and the reaction is endothermic
-
evolved and the reaction is exothermic
- absorbed and the reaction is exothermic
The correct answer is: 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.