Decomposition Reaction Explained
The question describes the breakdown of calcium carbonate (CaCO₃$) into calcium oxide (CaO$) and carbon dioxide (CO₂$) when subjected to heat.
This process is a decomposition reaction because a single compound breaks down into two or more simpler substances.
The specific type of decomposition is determined by the energy source required for the reaction.
- Heating is the energy source mentioned in the question.
- Decomposition reactions driven by heat are called thermal decomposition reactions.
The chemical equation for this reaction is:
\text{CaCO}_3(s) \xrightarrow{\Delta} \text{CaO}(s) + \text{CO}_2(g)$
Other options are incorrect because:
- Photo decomposition uses light.
- Exothermic reactions release heat (this reaction requires heat, making it endothermic).
- Electrolytic decomposition uses electricity.
Therefore, the decomposition of calcium carbonate on heating is a thermal decomposition reaction.
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Important Questions from Chemical Reaction
Which of the following statement is/are true?
I. In physical change new substance is formed. substance is formed.
II. In chemical change no new substance is formed.
Which of the following cells involves similar chemical reactions?
The information not obtained from balanced chemical equation is
Oxygen cannot be obtained by which one of the following methods?
Which of the following statement is correct?
I. Insoluble salt is obtained by precipitation reaction.
II. Addition of oxygen or loss of hydrogen is called oxidation.
