When an iron nail is placed in copper sulphate solution, which salt is mainly present in the green solution formed?
Answer and explanation
Correct answer: Iron(II) sulphate, \(FeSO_4\)
Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\). The iron(II) sulphate, \(FeSO_4\), formed gives the solution a pale green colour. Therefore, option A is correct. Copper(II) sulphate solution is blue and is consumed in the reaction.
Frequently asked questions
What is the correct answer to this question?
Iron(II) sulphate, \(FeSO_4\)
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 iron(II) sulphate, \(FeSO_4\), formed gives the solution a pale green colour. Therefore, option A is correct. Copper(II) sulphate solution is blue and is consumed in the 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.
