MCQ
Collin’s reagent is
- A$MN{O_2}/HCl$
- B$MN{O_4}/{C_5}{H_5}N$
- C${K_2}C{r_2}{O_7}/{H_2}S{O_4}$
- ✓$C{r_2}{O_3}/2{C_5}{H_5}N$
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(Given : $\Delta_{\mathrm{r}} \mathrm{H}_{298 \mathrm{~K}}^{\circ}=-54.07 \mathrm{~kJ} \mathrm{~mol}^{-1}, \Delta_{\mathrm{I}} \mathrm{S}_{298 \mathrm{~K}}^{\circ}=10 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ and $\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} ; 2.303 \times 8.314 \times 298=5705$ )

