A student dipped an iron nail in a blue copper sulphate solution for some time. A reddish-brown coating formed on the nail and the solution turned green. Which type of reaction does this change illustrate?
Answer and explanation
Correct answer: A displacement reaction in which iron displaces copper from its salt
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). Reddish-brown copper deposits on the nail, and green iron sulphate solution forms. This is not a combination reaction because it produces two products rather than a single product.
Frequently asked questions
What is the correct answer to this question?
A displacement reaction in which iron displaces copper from its salt
Why is this the correct answer?
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). Reddish-brown copper deposits on the nail, and green iron sulphate solution forms. This is not a combination reaction because it produces two products rather than a single product.
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.
