When an iron nail is kept in a blue copper sulphate solution for some time, the solution turns light green and a reddish-brown coating forms on the nail. 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: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). The iron sulphate solution is light green, while copper forms a reddish-brown deposit on the nail. This is not a combination reaction because the reactants do not combine to form a single product.
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: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). The iron sulphate solution is light green, while copper forms a reddish-brown deposit on the nail. This is not a combination reaction because the reactants do not combine to form 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.
