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The standard  electrode  potentials\mathrm{\left ( E_{M^{+}|M}^{0} \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 sequence of deposition of metals on applying potential is :

Option: 1

  A, C, B, D


Option: 2

 B, D, C, A


Option: 3

C, B, D, A


Option: 4

D, A, B, C


Answers (1)

best_answer

The higher the standard electrode potential \mathrm{E^0_{M^+|M}} of the metal, greater is its tendency to get reduced and get deposited on the electrode.

Order of the given \mathrm{E^0 \textrm{ value : }\:0.85V> 0.6V> -0.76V> -1.2}

\therefore The order of deposition will be C, B, D, A.

Hence, the correct answer is Option (3)

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