Question

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?
A. $NaN{O_3}$
B. $KCl{O_3}$
C. $CaC{O_3}$
D. $N{H_4}N{O_3}$

Answer 1

Hint: To know the exact answer, we should check the reaction of every option separately, whether the given products of the reaction are acidic as well as basic or not. We will also discuss more about the correct option.

Complete step by step answer:
When calcium carbonate is heated, it breaks down to form calcium oxide and carbon dioxide.
Thermal decomposition is the process in which heat is required. It is also known as thermolysis.
It is processed in which a compound breaks into two or more products when the heat is supplied. This reaction is used for the production of oxygen. This reaction is also used for production of acidic as well as basic oxides.
$CaC{O_3}$ on thermal decomposition gives:
$CaC{O_3} \to CaO + C{O_2}$
$
  CaO \to Basic\,Oxide \\
  C{O_2} \to Acidic\,oxide \\
$
Oxide is a compound which primarily consists of one oxygen and any other element.
Oxide are of two types
1) acidic oxide
2) basic oxide
Acidic oxide are oxides which react with water to form acids or they react with base to form salts.
Basic oxides are oxides which are formed when oxygen reacts with metals which maybe alkaline or alkaline earth like metals.
$CaC{O_3}$ is the only compound which on thermal decomposition gives both acidic as well as basic compounds.

So, the correct answer is Option C.

Note: Thermolysis is an important step prior to the densification in sintering. Incomplete binder removal and uncontrolled thermolysis may introduce membrane defects. It is a process of burning out the organic components such as binder and dispersant.