Question

What is the substance formed in a chemical reaction?

Answer 1

Hint: A chemical reaction is a process in which two or more substances undergo a chemical change to produce one or more different substances as products. Breaking of bonds and formation of new bonds takes place during a chemical reaction.

Complete answer:
During a chemical reaction, chemical changes take place where some chemical bonds break and new chemical bonds form.
Any chemical change involving the reaction between two or more substances to produce new species can be represented in the form of an equation. The reacting substances in a chemical reaction placed before the arrow are known as reactants and the resulting species produced due to the reaction between reactants are known as products. Products are placed on the right-hand side of the arrow in a chemical equation.
$$\text{Reactants}\to \text{Products}$$
Let us consider an example where a chemical reaction takes place between oxygen and hydrogen that produces two molecules of water. Bonds between the atoms of hydrogen and oxygen break and the formation of new bonds takes place between hydrogen and oxygen. Its chemical reaction can be written as follows:
$$2{\text{H}}_{\text{2}}\text{O(g)}+{\text{O}}_{\text{2}}\text{(g)}\to 2{\text{H}}_{\text{2}}\text{O(l)}$$
Thus in this chemical reaction, hydrogen and oxygen gases are reactants while the water formed is known as the product of the reaction.

Note:
The chemical reaction in which water forms is an example of a synthesis reaction where two substances react to form a product. There are many other types of chemical reactions including decomposition, replacement, and combustion reactions.