ChemistryHard35×since 2002Q1788In acidic medium, K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7K2Cr2O7 shows oxidising action as represented in the half reaction: Cr2O72−+XH++Ye⊖→2 A+ZH2O\mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}+\mathrm{XH}^{+}+\mathrm{Ye}^{\ominus} \rightarrow 2 \mathrm{~A}+\mathrm{ZH}_2 \mathrm{O}Cr2O72−+XH++Ye⊖→2 A+ZH2O X,Y,Z\mathrm{X}, \mathrm{Y}, \mathrm{Z}X,Y,Z and A\mathrm{A}A are respectively are :A14,7,614,7,614,7,6 and Cr3+\mathrm{Cr}^{3+}Cr3+B14,6,714,6,714,6,7 and Cr3+\mathrm{Cr}^{3+}Cr3+C8,4,68,4,68,4,6 and Cr2O3\mathrm{Cr}_2 \mathrm{O}_3Cr2O3D8,6,48,6,48,6,4 and Cr2O3\mathrm{Cr}_2 \mathrm{O}_3Cr2O3Check answerSkip