E ° values of three metals are listed below. Zn 2 + ( aq ) + 2 e – → Zn ( s ) ; E ° =…

Chemistry · Class 12 · CBSE — Electrochemistry

E° values of three metals are listed below.
Zn2+(aq) + 2e– → Zn(s) ; E° = –0.76 V
Fe2+(aq) + 2e– → 2Fe(s) ; E° = –0.44 V
Sn2+(aq) + 2e– → Sn(s) ; E° = – 0.14 V
Which of the following statements are correct on the basis of the above information?
(i) Zinc will be corroded in preference to iron if zinc coating is broken on the surface.
(ii) If iron is coated with tin and the coating is broken on the surface then iron will be corroded.
(iii) Zinc is more reactive than iron but tin is less reactive than iron.
  1. (i) and (ii)
  2. (ii) and (iii)
  3. (i), (ii) and (iii)
  4. (i) and (iii)

Answer

(C) (i), (ii) and (iii)

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