NDA General Science Chemistry Questions Part 2

Copper doesn't replace iron from its solution.
- This is because Copper is less reactive than iron.
- A more reactive metal displaces the less reactive metal from its solution.
- In the given reaction, Iron (Fe) displaces Copper (Cu) by giving up two electrons and gets oxidized and forms a new compound called ferrous sulfate.
- Copper gets reduced.
- Iron is a reducing agent, meaning that it loses 2 electrons.
- mathrm‌CuSO4 is an oxidizing agent, taking 2 electrons.
- The final solution turns green on exposure to moist air.
- The reaction is a redox reaction as it involves both loss and gain of electrons by different elements.