Decomposition Reaction|Endothermic Reaction

Identify the type of reaction in the following experiment: (I) Combination Reaction (II) Decomposition Reaction (III) Exothermic Reaction (IV) Endothermic Reaction

In endothermic reactions

In endothermic reactions,

Decomposition Reaction|Displacement Reaction|OMR

For an endothermic reaction,

In an endothermic reaction