Question

The standard electrode potentials $\left(E_{M^{+}/M}^o\right)$ of four metals A, B, C and D are -1.2 V, 0.6 V, 0.85 V and -0.76 V, respectively. The increasing sequence of deposition of metals on applying potential is :

• A. A, C, B, D
• B. B, D, C, A
• C. C, B, D, A
• D. D, A, B, C

Answer 1

Answer: (C)

C, B, D, A

The standard electrode potentials $\left(E_{M^{+}/M}^o\right)$ of four metals A, B, C and D are $-1.2V,0.6V,0.85Vand-0.76V$ respectively. The increasing sequence of deposition of metals on applying potential is $C,B,D,A$. $C$ is having maximum standard reduction potential of $0.85V$ and $A$ is having minimum standard reduction potential of $-1.2V$. The, increasing sequence of deposition of metals on applying potential is equal to the decreasing sequence of the standard reduction potentials.