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MHT CET202616 April 2026Morning ShiftChemistryElectrochemistryActual

The cells A and B contain aqueous solutions of ferrous chloride and ferric chloride respectively. The mass of iron deposited by the same quantity of electricity in cells A and B is in the ratio.

Options

  1. A1:1
  2. B2:1
  3. C3:1
  4. D3:2

Correct answer

D. 3:2

Step-by-step solution

In cell A, ferrous chloride ( FeCl ₂ ) contains iron in the +2 oxidation state. The reduction reaction is: Fe ²⁺ + 2e⁻ Fe The equivalent weight of iron in cell A is E_A = M 2 , where M is the atomic mass of iron. In cell B, ferric chloride ( FeCl ₃ ) contains iron in the +3 oxidation state. The reduction reaction is: Fe ³⁺ + 3e⁻ Fe The equivalent weight of iron in cell B is E_B = M 3 . According to Faraday's second law of electrolysis, the mass of a substance deposited by the same quantity of electricity is directl

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