Question

Which substance serves as reducing agent in the following reaction
$14H^{+}+Cr_{2}O_{7}^{- 2}+3Ni \rightarrow 2Cr^{+ 3}+7H_{2}O+3Ni^{+ 2}$ :-

• A. $H_{2}O$
• B. $Ni$
• C. $H^{+}$
• D. $Cr_{2}O_{7}^{- 2}$

Answer 1

Answer: (B)

Reducing agent itself gets oxidised.