Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas NEET2020ChemistryElectrochemistryPractice

What is the standard cell Potential E Cell o for following cell reaction? 2Fe(s) + O 2 (g) + 2H 2 O(l) ⇌ 2Fe 2+ (aq) + 4OH - (aq) Given E o Fe 2+ (aq) | Fe = − 0 .44 V E o O 2 (g) | H 2 O | OH = 0 .4 V

Options

  1. AE cell o =  − 0. 48   V
  2. BE cell o =  − 0 .04   V
  3. CE cell o = +   0 .84   V
  4. DE c e l l 0 = + 1.28 V

Correct answer

C. E cell o = +   0 .84   V

Step-by-step solution

2Fe(s)   +   O 2 (g)   +   2H 2 O(l) ⇌ 2Fe 2+ (aq)   +   4OH − (aq) For the given cell reaction E cell o   =   E cathode o − E anode o =   0 .40 − − 0 .44   =   0 .84   V

Practice Electrochemistry on Quantrex Academy →

More from Electrochemistry

Calculate the conductivity of 0.025 M BaCl ₂ solution if the molar conductivity of salt at 25^ C is 325 ⁻¹ cm ^2 mol ⁻¹ . 2026Calculate the equilibrium constant at 25 ^ C for the cell reaction, Ni(s) + Cu ²⁺(1 M ) Ni ²⁺(1 M ) + Cu(s) if E^ _ cell is 0.592 V . 2026Calculate the time required in second to deposit 5.85 g Ni from NiCl ₂ solution by passing 10 A current (molar mass of Ni = 58.5 g mol ⁻¹ ) 2026Which of the following cell reactions is exhibited by fuel cell? 2026Which of the following types of cells is used for electroplating? 2026Which of the following acts as a cathode in a dry cell? 2026What is the Standard cell potential of a cell constituted by two electrodes, A (E^0_ A ^+/ A = 0.30 V ) and B (E^0_ B ^+/ B = +0.42 V ) ? 2026How long (in minutes) must a 2 A current be passed through AgNO ₃ solution to deposit 5.4 g Ag ? [Molar mass of Ag = 108 g mol ⁻¹ ] 2026 Full Electrochemistry list All NTA Abhyas NEET PYQs