Q73 / 180 · NEET 2016 (Phase 2) · Chemistry

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

  • A
    Zinc is lighter than iron
  • B
    Zinc has lower melting point than iron
  • C
    Zinc has lower negative electrode potential than iron
  • Correct answer
    D
    Zinc has higher negative electrode potential than iron

Solution

E Zn 2+ |Zn o = −0.76  V

E Fe 2+ |Fe o = −0.44  V

Zinc has higher negative electrode potential than iron. So, zinc can be coated on iron to produce galvanized iron but the reverse is not possible.

Hence, the correct answer is option: 'D'.

Relevant Questions