Question

In a ________ reaction, two or more elements or compounds form one product. decomposition single replacement double replacement combination dehydration

Answer 1

In a COMBINATION reaction, two or more elements or compounds form one product. Combination reaction is sometimes also refer to as synthesis reaction, it is a type of reaction in which a single new product is formed by the combination of two or more elements. The reaction is typically represented by:
X + Y = XY.