Reaction 1 and Option A is the correct answer as the first reaction is a decomposition Reaction of Lime stone.
What is a Decomposition Reaction ?
A reaction in which the reactant breaks up/ decomposes into simpler parts (two or more products ) is called a Decomposition Reaction , It usually requires energy input.
It can be classified into three types
- Thermal Decomposition
- Electrolytic Decomposition
- Photo Decomposition
Reaction 1 i.e.
CaCO₃(s) → CaO (s) + CO₂ (g) is a Thermal Decomposition Reaction ,
In this reaction Calcium Carbonate(lime stone) decomposes into CaO (Quick Lime) and Carbon Dioxide Gas , CO₂ when heat is supplied .
Quick lime is a major constituent of cement and therefore this decomposition of Lime stone is done.
Therefore Reaction 1 and Option A is the correct answer as the first reaction is a decomposition Reaction of Lime stone.
To know more about Decomposition Reaction
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