Question

Which of the following is a displacement reaction? (a) CaCO3 CaO + CO2 (b) CuO + H2 Cu + H2O (c) C + O2 CO2 (d) Fe + CuSO4 FeSO4 + Cu​

Answer 1

Answer:

I think option d is correct

Answer 2

A less reactive element from its compound being replaced by a more reactive metal during a chemical reaction is called displacement reaction.

Fe + CuSO4→ FeSO4 + Cu​ is an example of displacement reaction.

As iron is a more reactive metal displaces copper from its salt solution.

C + O2→ CO2  is an example of a combination as well as a combustion reaction.

CuO + H2→ Cu + H2O is an example of a redox reaction.

CaCO3→ CaO + CO2 is an example of a decomposition reaction.