MCQ
Consider the following reaction sequence,


- A$A,B,D$
- ✓$A,B,C$
- C$A,B$
- D$A,D$


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$E_{\frac{1}{2}Cl_2/Cl^- }^o = 1.36\,V\,,\,E_{C{r^{3 + }}/Cr}^o = - 0.74\,V$
$E_{C{r_2}O_7^{2 - }/C{r^{3 + }}}^o = 1.33\,V\,,\,E_{MnO_4^ - /M{n^{2 + }}}^o = 1.51\,V$
The correct order of reducing power of the species $(Cr, Cr^{3+}, Mn^{2+}$ and $Cl^-)$ will be

${H_2}(g)\, + \,{I_2}(g)\, \rightleftharpoons \,2HI(g)$ is