- ✓Geometrical
- BOptical
- CPosition
- DNone of these
$\mathop {\begin{array}{*{20}{c}}{H - C - C{H_3}}\\{|\,|\,\,\,\,\,}\\{H - C - C{H_3}}\end{array}}\limits_{{\rm{cis - Butene - 2}}} $ $\mathop {\begin{array}{*{20}{c}}{\,\,\,\,\,H - C - C{H_3}}\\{|\,|}\\{C{H_3} - C - H\,\,\,\,\,\,}\end{array}}\limits_{{\rm{trans - Butene - 2}}} $
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$2 \mathrm{Fe}_{(\mathrm{s})}+\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{Fe}_2 \mathrm{O}_{3(\mathrm{~s})}, \Delta \mathrm{H}^{\mathrm{o}}=-822 \mathrm{~kJ} / \mathrm{mol}$
$\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{CO}_{(\mathrm{g})}, \Delta \mathrm{H}^{\mathrm{o}}=-110 \mathrm{~kJ} / \mathrm{mol}$
Then enthalpy change for following reaction
$3\mathrm{C}_{(\mathrm{s})}+\mathrm{Fe}_2 \mathrm{O}_{3(\mathrm{~s})} \rightarrow 2 \mathrm{Fe}_{(\mathrm{s})}+3 \mathrm{CO}_{(\mathrm{g})}$