Chemistry · 2025
JEE Main · 3 April 2025, Shift 2 · Q56
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…
The standard cell potential ( $\displaystyle \mathrm{E}_{\text {cell }}^{\ominus}$ ) of a fuel cell based on the oxidation of methanol in air that has been used to power television relay station is measured as $\displaystyle 1.21$ V . The standard half cell reduction potential for $\displaystyle \mathrm{O}_2\left(\mathrm{E}_{\mathrm{O}_2 / \mathrm{H}_2 \mathrm{O}}^{\circ}\right)$ is $\displaystyle 1.229$ V.
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Official answer
From NTA’s final answer key for this paper.
(3)
The standard half cell reduction potential for the reduction of $\displaystyle \mathrm{CO}_2\left(\mathrm{E}_{\mathrm{CO}_2 / \mathrm{CH}_3 \mathrm{OH}}^{\circ}\right)$ is $\displaystyle 19$ mV
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JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.