Question

Identify the type of reaction
${\text{Zinc carbonate}} \to {\text{Zinc oxide}} + {\text{Carbon dioxide}}$
A. Neutralization Reaction
B. Decomposition Reaction
C. Displacement Reaction
D. Combination Reaction

Answer 1

Hint: We have to remember that the chemical reactions that occur by one or more substances are converted into another one or more substances and these chemical reactions are described by chemical equations. As we know that the chemical reactions depend on temperature, pressure and volume of the system.

Complete step by step answer:
Let’s start with basic discussion of the options given to us. Neutralization reaction is a reaction between an acid and a base which produces the water and salt. Decomposition reaction is the one in which the bigger molecule breaks into smaller molecules. Displacement reaction is the one in which an atom or a set of atom moves from one molecule to another. And the combination reaction is the one in which two or more elements or compounds combine together to form a new compound.
In the question above we are given the equation:
${\text{Zinc carbonate}} \to {\text{Zinc oxide}} + {\text{Carbon dioxide}}$
The molecular equation of this is
${\text{ZnC}}{{\text{O}}_3} \to {\text{ZnO + C}}{{\text{O}}_2}$
From this equation it is visible that the ZnCO3 is breaking into two smaller molecules which are ZnO and $CO_2$. Hence the reaction is a decomposition reaction.
So, the answer to this question is option B. Decomposition Reaction.
We have to know that the neutralization reaction is a reaction between an acid and a base, in the decomposition reaction bigger molecules break into smaller molecules. Therefore, the option A is incorrect.
As we know that in a displacement reaction an atom or a set of atoms moves from one molecule to another. Therefore, the option C is incorrect.
We have to remember that in combination reactions two or more combine together to form a new compound. Therefore, the option D is incorrect.

So, the correct answer is Option B.

Note: We must remember that the decomposition reaction is being used for industrial purpose as well as in our households. In industries it is being used in the metallurgy section for the extraction of metals from their own ores. Furthermore the reaction for relief from acid indigestion is also a decomposition reaction.