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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Reason : Zinc has a more negative electrode potential than iron.
(Given : Molar Mass $\mathrm{Na}: 23$ and $\mathrm{Cl}: 35.5 \mathrm{gmol}^{-1}$ )