Question

What moles of Cr₂O7^2– reduced in Cr³⁺ by the addition of 12 moles of electrons ?

(a)  6,

(b)  5

(c)  2

(d)  12

Answer 1

2  moles of Cr₂O7^2– reduced in Cr³⁺ by the addition of 12 moles of electrons.