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Electrochemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
MCQ
The factors that promote electro chemical corrosion are $.......$
  • A
    The nature of the impurity metal with which the metal under consideration is associated.
  • B
    The concentration of $O_2$ in contact with the surface of the metal.
  • C
    Highly conducting solutions.
  • ✓
    All the above.
✓

Answer

Correct option: D.
All the above.
Pure metals are resistive to corrosion. If there are impurities in a metal, a local galvanic cell is created with the metal as an anode and the impurity as a cathode. The result is the corrosion of the metal. And in the presence of a high concentration of oxygen, corrosion will be faster. Also when the conductivity of solutions is higher, the corrosion will be faster.

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