When an iron nail is placed in a blue copper sulphate solution, the solution changes colour and copper gets deposited. What type of reaction is this?
Answer and explanation
Correct answer: Displacement reaction
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). The blue copper sulphate solution turns green due to iron sulphate, and copper deposits on the nail. Therefore, this is a displacement reaction. In contrast, a combination reaction forms one product from two or more reactants.
Frequently asked questions
What is the correct answer to this question?
Displacement reaction
Why is this the correct answer?
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). The blue copper sulphate solution turns green due to iron sulphate, and copper deposits on the nail. Therefore, this is a displacement reaction. In contrast, a combination reaction forms one product from two or more reactants.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
