Question

Name the type of following chemical reaction.
$KN{O_3} + {H_2}S{O_4} \to HN{O_3} + KHS{O_4}$
(A) Displacement Reaction
(B) Double Displacement Reaction
(C) Combination Reaction
(D) Decomposition Reaction

Answer 1

A process in which one or more substances change their form physically as well as chemically is known as a chemical reaction. There are different types of chemical reactions. In the reaction given, the anions displace themselves from the cations and exchange their positions with each other.

Complete Step by step solution
Chemical reactions are of many different types. An equation which represents a chemical reaction is known as a chemical equation.
Displacement reaction: In this type of reaction, one or more atoms in a molecule are displaced by another type of element. The representation of the displacement reaction can be done as follows,
$A + BC \to C + AB$
Double Displacement reaction: In this type of reaction, two compounds exchange their ions with each other in order to form two new products. The representation of double displacement reaction can be done as follows,
$AB + CD \to AC + BD$
Combination reaction: In this type of reaction, two or more substances combine or join together in order to form a new single product. This type of reaction is also known as synthesis reaction. The representation of combination reaction can be done as follows,
$A + B \to AB$
Decomposition reaction: In this type of reaction, a complex substance breaks down in order to form two or more products. The representation of decomposition reaction can be done as follows,
$AB \to A + B$
The reaction given is as follows,
$KN{O_3} + {H_2}S{O_4} \to HN{O_3} + KHS{O_4}$
Here $KN{O_3}$ and ${H_2}S{O_4}$ exchange their ions with each other in order to form $HN{O_3}$ and $KHS{O_4}$ . Hence the reaction is a double displacement reaction.
Therefore, the correct answer is option B.

Note
In a reaction, the substances which undergo change are known as reactants and the final substances formed are known as products, that is the substance which are present on the left side of the chemical reaction are reactants and the substances present on the right side of the chemical reaction are known as products. Chemical reactions mostly involve breaking of old bonds and formation of new bonds accompanied by absorption or evolution of heat/energy.