Question

Name the type of the following chemical reaction:
\[2KCl{{O}_{3}}\xrightarrow{{}}2KCl+3{{O}_{2}}\]
a.) Combination
b.) Decomposition
c.) Displacement
d.) Precipitation

Answer 1

Hint: In decomposition reaction, single reactant undergoes breakdown to produce multiple products.
In the given reaction, \[KCl{{O}_{3}}\] is breaking down to produce $KCl$ and \[{{O}_{2}}\]. Decomposition reactions take place in presence of heat.

Complete step by step answer:
-Chemical reactions involve making and breaking of chemical bonds.
-In combination reaction, two or more substances, compounds or reactants react to form single product.
For example, Carbon reacts with carbon dioxide to produce carbon dioxide as a single product.
-Energy is released along with the product, such reactions are called exothermic.
-In decomposition reaction, single reactant undergoes breakdown to produce multiple products.
For example, Silver chloride in presence of sunlight breaks down to produce silver and chlorine.
-Energy is required in the form of heat or energy to break down a single reactant, such reactions are called endothermic reactions.
- When Iron is treated with copper sulphate, iron sulphate and copper are produced, so in this reaction iron is displaced by copper. Such reactions in which One element removes or displaces another element are known as displacement reactions.
-When sodium sulphate is treated with barium chloride, Barium Sulphate and sodium chloride are produced. Sodium chloride is soluble in water, but Barium sulphate is insoluble and forms a white precipitate. It is an example of precipitation reaction.
So, $2KCl{{O}_{3}}\xrightarrow{{}}2KCl+3{{O}_{2}}$

Single reactant is decomposing to produce different products,
So, the correct answer is “Option B”.

Note: When Calcium carbonate is heated, it undergoes decomposition to produce calcium oxide and carbon dioxide. Such reactions in which decomposition occurs in presence of heat, it is known as thermal decomposition. In precipitation, there is exchange of ions between both reactants so it is also known as double precipitation reaction.