What kind of reaction shows two reactants combining to form one new product? a) a single-replacement reaction b) a double-replacement reaction c) a decomposition reaction d) a synthesis reaction

I think that the answer is D, a synthesis reaction

Answer : The correct option is, D) a synthesis reaction

Explanation :

Synthesis reaction : It is a type of reaction in which the two or more reactants react to give a single new product.

It is represented as :

Single-displacement reaction : It is a type of reaction in which the more reactive metal displaces the least reactive metal from its solution.

It is represented as :

where A is the most reactive metal and BC is the compound in which the B

Decomposition reaction : It is a type of reaction in which a single larger is the least reactive metal which is displaced by the most reactive metal A. compound decomposes to give two or more smaller molecules as a product.

It is represented as :

Double-displacement reaction : It is a type of chemical reaction in which the two compounds react and positive cation and negative anion of two reactants exchange their places to form two new products.

It is represented as :

Where A and C are the cation and B and D are the anion.

Hence, the correct option is, D) a synthesis reaction

Yes i think so not 100 percent sure though