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The standard cell potential ( E _ cell ^ ) of a fuel cell based on the oxidation of methanol in air that has been used to power television relay station is measured as 1.21 V. The standard half cell reduction potential for O ₂ ( E _ O ₂ / H ₂ O ^ O ) is 1.229 V. Choose the correct statement:

Options

  1. AThe standard half cell reduction potential for the reduction of CO ₂ ( E _ CO ₂ / CH ₃ OH ^0 ) is 19 mV
  2. BOxygen is formed at the anode.
  3. CReactants are fed at one go to each electrode.
  4. DReduction of methanol takes place at the cathode.

Correct answer

A. The standard half cell reduction potential for the reduction of CO ₂ ( E _ CO ₂ / CH ₃ OH ^0 ) is 19 mV

Step-by-step solution

aligned E _ cell ^ o & = E _ cathode ^ o - E _ Anode ^ o 1.21 & =1.229- E _ Anode ^ o aligned Fuel cell involves oxidation of methanol which will occur at anode and reduction of O ₂ will occur at cathode.

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