When an iron nail is placed in copper sulphate solution, what is the reddish-brown coating formed on the nail?
Answer and explanation
Correct answer: Copper
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). The released copper deposits on the iron nail as a reddish-brown coating. Iron sulphate is formed in the solution, while zinc is not involved in this reaction.
Frequently asked questions
What is the correct answer to this question?
Copper
Why is this the correct answer?
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). The released copper deposits on the iron nail as a reddish-brown coating. Iron sulphate is formed in the solution, while zinc is not involved in this reaction.
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.
