Question

What is synthesis reaction?
A. A reaction in which two or more substances combine to form a new compound
B. A reaction of an acid and a base
C. A reaction in which a compound forms a new compound
D. A reaction where atoms combine to make elements
E. A reaction in which a compound breaks into separate elements

Answer 1

Hint: It is found that synthesis reaction is one of the major types of chemical reaction, that include various reactions like combustion, single displacement, and double displacement reactions.

Complete answer:
- In simple terms we can say that synthesis reaction is a reaction where many reactants can combine to form a particular product. For example, formation of water from oxygen and hydrogen.
- Generally, it is found that when synthesis reaction occurs, a release of energy takes place and the reaction is exothermic. But, an endothermic outcome is also possible.
- There are various factors that influence the synthesis reaction like:
Quality of reagents, reactants and of catalysts is found to be important in synthesis reaction.
(i) Reaction conditions- As we know that synthesis reactions are sensitive to various factors like pressure, temperature etc. Hence, accurate control of these factors is necessary for synthesis reaction.
(ii) Reaction kinetics- We must have a proper knowledge of reaction rates to ensure maximum product yield and minimum byproducts.

- Hence, we can conclude that the correct option is (a) that is synthesis reaction is a reaction in which two or more substances combine to form a new compound.

Note: - We can note here that, basically, the synthesis reaction is the reversal of a decomposition reaction.
 - Synthesis reaction is found to increase the production of required molecules and reduce the byproduct molecules.