On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution
- turns blue, and a grey substance is deposited on the copper coin.
- turns colourless and a grey substance is deposited on the copper coin.
- turns colourless and a reddish–brown substance is deposited on the copper coin.
- remains green with no change in the copper coin.
Answer:
- A displacement reaction is a reaction in which a more reactive element takes the place of a less reactive element in a chemical compound.
- Copper metal is less reactive than Iron.
- So, when copper is added to the ferrous (Iron) sulphate solution, no reaction takes place .
Therefore, the correct answer is (d) Ferrous sulphate solution remains green with no change in the copper coin.