MCQ
When $S{O_2}$ is passed through acidified ${K_2}C{r_2}{O_7}$ solution
- AThe solution turns blue
- BThe solution is decolourised
- C$S{O_2}$ is reduced
- ✓Green $C{r_2}{(S{O_4})_3}$ is formed
✓
Answer
Correct option: D.
Green $C{r_2}{(S{O_4})_3}$ is formed
d
(d) ${K_2}C{r_2}{O_7} + {H_2}S{O_4} + 3S{O_2}\, \to $
(d) ${K_2}C{r_2}{O_7} + {H_2}S{O_4} + 3S{O_2}\, \to $
${K_2}S{O_4} + \mathop {C{r_2}{{(S{O_4})}_3}}\limits_{{\rm{Green}}} + 3{H_2}O$
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$\begin{matrix}
O\,\,\, \\
||\,\,\, \\
C{{H}_{3}}-C-C{{H}_{2}}- \\
\end{matrix}\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}-C-C{{H}_{3}}\xrightarrow[\Delta ]{{{(N{{H}_{4}})}_{2}}C{{O}_{3}}}\xrightarrow[\Delta ]{CC{{l}_{3}}C{{O}_{2}}Na}\underset{(major)}{\mathop{(B)}}\, \\
\end{matrix}$
→O\,\,\, \\
||\,\,\, \\
C{{H}_{3}}-C-C{{H}_{2}}- \\
\end{matrix}\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{2}}-C-C{{H}_{3}}\xrightarrow[\Delta ]{{{(N{{H}_{4}})}_{2}}C{{O}_{3}}}\xrightarrow[\Delta ]{CC{{l}_{3}}C{{O}_{2}}Na}\underset{(major)}{\mathop{(B)}}\, \\
\end{matrix}$
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