MCQ
$(A)$ (major)


- A

- ✓

- C

- D







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If $E_{op}^o$ for this electrode is $1.30\,volt$ then what will be the oxidation electrode potential at $pH = 3$ ? .............. $\mathrm{volt}$
$\mathrm{FeO}_{(0)}+\mathrm{C}_{\text {(gaplike) }} \longrightarrow \mathrm{Fe}_{(0)}+\mathrm{CO}_{(\mathrm{g})}$
| Substance |
$\Delta \mathrm{H}^{\circ}$ $\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)$ |
$\Delta \mathrm{S}^{\circ}$ $\left(\mathrm{J} \mathrm{mol}^{-1} \mathrm{~K}^{-1}\right)$ |
| $\mathrm{FeO}_{(s)}$ | $-266.3$ | $57.49$ |
| $\mathrm{C}_{\text {(graphite) }}$ | $0$ | $5.74$ |
| $\mathrm{Fe}_{(s)}$ | $0$ | $27.28$ |
| $\mathrm{CO}_{(\mathrm{g})}$ | $-110.5$ | $197.6$ |
The minimum temperature in $\mathrm{K}$ at which the reaction becomes spontaneous is ....... .
(Integer answer)