Question

Which substance serves as reducing agent in the following reaction
$14H^{+}+C{r}_2{O}_7^{-2}+3Ni\to 2C{r}^{+3}+7H_{2}O+3N{i}^{+2}$ :-

• A. $H_{2}O$
• B. $Ni$
• C. $H^{+}$
• D. $C{r}_2{O}_7^{-2}$

Answer 1

Answer: (B)

Reducing agent itself gets oxidised.