Question

What kind of chemical reaction is synthesis? Choose the correct option(s) for its explanation:
A. Complex products are formed
B. Reactants are always elements
C. Reactants are always compounds
D. It is a type of combination reaction

Answer 1

Firstly we have to define what exactly are synthesis reactions. Then we can get to the proper definitions covering all the options so that we can take care of the options. Now after that we will get that the complex products are always ought to form. Apart from that it would be a combustion reaction.

Complete answer:
In order to answer this question we have to go through each option and then enlist them as proper outcomes so that we would be able to pick between them as one or many one would be the answer we ought to get as the correct one in this case. (As the option is multiple choice).
Firstly we need to give the definition regarding the synthesis reaction and some facts about the nature of these kinds of chemical reactions.
We can say that synthesis reaction is a kind of chemical reaction where there are two or more simple substances reacting together in order to combine to form a more complex product. It is also called a direct combination reaction. The reactants involved in the reaction could be anything between the elements or compounds. Although the product formed after the process is always a compound.
When we talk about the general form of a synthesis chemical reaction, we get that as:
$A+ B \to AB$

Hence, correct answer is option D.

Note: Organic synthesis reactions may involve more than two different molecules, and mixtures of products can occur along with unreacted starting materials. Intermediate molecules may form that can lead to the formation of byproducts. In addition, depending on how the two colliding reactant molecules orient, both the desired product and byproducts may form - which may affect product purity.