Question

When magnesium metal is heated in air it begins to release large amounts of heat and light. What kind of a reaction is this an example of?



A. a fusion reaction


B. a fission reaction


C. a combustion reaction


D. an endothermic reaction

Answer 1

C. Combustion reaction.

These reaction are exothermic.

The reactions are:

2Mg + O2 -----> 2MgO

3Mg + N2 ------> Mg3N2

Answer 2

C. Combustion.
Any reaction that produces light or fire is a combustion reaction.