The efficiency of fuel cell is given by the expression η is
Show Hint
- \( \eta = \dfrac{nF E_{\text{cell}}}{\Delta H} \times 100 \)
- \( \eta = \dfrac{nF E_{\text{cell}}}{\Delta S} \times 100 \)
- \( \eta = \dfrac{nF E_{\text{cell}}}{\Delta A} \times 100 \)
- None of the above
The Correct Option is A
Solution and Explanation
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The elements of the 3d transition series are given as: Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn. Answer the following:
Copper has an exceptionally positive \( E^\circ_{\text{M}^{2+}/\text{M}} \) value, why?
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In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of \( E^\circ_{\text{FeO}_4^{2-}/\text{Fe}^{2+}} \) is:
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Assertion (A): Cu cannot liberate \( H_2 \) on reaction with dilute mineral acids.
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