Question

In the reduction of dichromate by $Fe(II)$ the number of electrons involved per chromium atom is.

• A. 2
• B. 3
• C. 4
• D. 1

Answer 1

Answer: (B)

3

Answer 2

$Cr_{2}^{6 +} + 6e^{-} \rightarrow 2Cr^{3 +}$; $Fe^{2 +} \rightarrow Fe^{3 +} + e^{-}$