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Electrochemistry question

2016 · Q91
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Electrochemistry question

2016 · Q91

NEETChemistryElectrochemistryMCQ+4 / −1
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
  1. A
    zinc is lighter than iron
  2. B
    zinc has lower melting point than iron
  3. C
    zinc has lower negative electrode potential than iron
  4. D
    zinc has higher negative electrode potential than iron
View written solutionFree

Correct answer: D

The reduction potential values are

E°Zn2+/Zn = – 0.76 V

E°Fe2+/Fe = – 0.44 V

Thus, due to higher negative electro potential value of zinc than iron, iron cannot be coated on zinc.

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