yes it can be , oxidation and reduction takes place separate as in one equation only reduction, oxidation is also takes place .

When only oxidation is place then the reaction called oxidation reaction and if reduction is takes place then it called reduction reaction .

And if both oxidation and reduction reaction exits in a reaction then it called redox reaction.

Answer:

1. No, reduction and oxidation can not take place alone. If one reactant is oxidised then its a confirm that reduction will also takes place in other compound. A nd hence they are named Redox reaction.
2. acquires a brownish look. This is because that iron is more reactive than copper.
3. The following chemical reaction takes place in this activity.
4. Fe+CuSO
5. 4
7. →FeSO
8. 4
10. +Cu
11. In this reaction, iron displaces copper from CuSO
12. 4
14. solution.