Which one of the following is not an example of a combination reaction a. 2H2O(I)---> 2H2(g)+O2(g) b. 2K+CI2--->2KCI c. 2H2+O2--->2H2O d. 2Mg+O2--->2MgO

Brandon Scott on September 28, 2018

The answer would be A. the Combination of the reaction, otherwise known as a synthesis reaction, occurs when two or more substances react and form a single, more complex substance.A combination of the reaction looks like this in an equation: a + B → AB reagents productSo two reagents become one product. Let's take a look at option A. 2H₂O(l) → 2H₂(g) + O₂(g) reactant product(s). Notice that from a substance, broke in two substances. So this is not a combination of the reaction. This is what is called a decomposition reaction.