Which of the following is a displacement reaction?

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CaCO3 → CaO + CO2

CaO + 2HCl → CaCl2 + H2O

Fe + CuSO4 → FeSO4 + Cu

NaOH + HCl → NaCl + H2O

answer is C.

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Detailed Solution

Fe + CuSO4 → FeSO4 + Cu is a displacement reaction.
The reaction is a chemical process that occurs when two reacting molecules combine or react with each other, resulting in the formation of a new product. Reactions can be classified into several types, including combination reactions, displacement reactions, decomposition reactions, and many others. Chemical reactions known as displacement reactions occur when a more reactive element removes a less reactive element from a molecule.
When iron reacts with copper sulphate solution a simple displacement reaction takes place to give Ferrous Sulphate and copper as products. The reaction involved is:
Fe + CuSO4 → FeSO4 + Cu

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