MCQ
The presence of halogen, in an organic compounds, is detected by
- AIodoform test
- BSilver nitrate test
- ✓Beilstein’s test
- DMillon’s test
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$\mathrm{A}(l) \rightarrow 2 \mathrm{B}(\mathrm{g})$
$\Delta \mathrm{U}=2.1\; \mathrm{kcal}, \Delta \mathrm{S}=20\; \mathrm{cal} \mathrm{K}^{-1}$ at $300\; \mathrm{K}$
Hence $\Delta \mathrm{G}$ in $\mathrm{kcal}$ is
Reason : Graphite is a good conductor.