How many electrons are involved in the following redox reaction?
Question:

How many electrons are involved in the following redox reaction?

$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{Fe}^{2+}+\mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow \mathrm{Cr}^{3+}+\mathrm{Fe}^{3+}+\mathrm{CO}_{2}$ (Unbalanced)

1. 3

2. 4

3. 5

4. 6

Correct Option: , 4

Solution:

Solution Not Required