MCQ
Which is the set of amphiprotic species ?
- A$H_3O^+, HPO_4^{2-}, HCO_3^-$
- B$H_2O, HPO_3^{2-}, H_2PO_2^-$
- ✓$H_2PO_4^-, H_2PO_3^-, H_2O$
- DAll of these
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$E^o_{Cr^{3+}/Cr} =-0.74\, V,\,$ $E^o_{MnO_4^-/Mn^{2+}} =1.51 \,V$
$E^o_{Cr_2O_7^{2-}/Cr^3+} =1.33\,V:$ $E^o_{Cl/Cl^-} =1.36\,V$
Based on the data given above, strongest oxidising agent will be :

Reason : Covalency of oxygen is two.
Step$-1$ : ${\text{A + E }} \rightleftharpoons AE$ (fast)
Step$-2$ :${\text{AE + A }} \to {A_2} + E$ (slow)
Step$-3$ :${{\text{A}}_2}{\text{ + B }} \to {\text{D}}$ (fast)
what rate law best agrees with this mechanism