when ${{\bf{K}}_{\bf{2}}}{\bf{C}}{{\bf{r}}_{\bf{2}}}{{\bf{O}}_{\bf{7}}}$ is converted to ${{\bf{K}}_{\bf{2}}}{\bf{Cr}}{{\bf{O}}_{\bf{4}}}$ , the change in the oxidation of chromium is

NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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when

{\mathbf{K}_\mathbf{2}}\mathbf{C}{\mathbf{r}_\mathbf{2}}{\mathbf{O}_\mathbf{7}}

is converted to

{\mathbf{K}_\mathbf{2}}\mathbf{Cr}{\mathbf{O}_\mathbf{4}}

, the change in the oxidation of chromium is

View answer and explanation

Correct option: A

Option A (0) is correct because the oxidation state of chromium remains +6 in both K2Cr2O7 and K2CrO4.

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{I_2}

\mathrm{MnO}_4^ - + {\mathrm{C}_2}\mathrm{O}_4^{2 - } + {\mathrm{H}^ + } \to \mathrm{M}{\mathrm{n}^{2 + }} + \mathrm{C}{\mathrm{O}_2} + {\mathrm{H}_2}\mathrm{O}

\mathrm{MnO}_4^ -

{\mathrm{C}_2}\mathrm{O}_4^{2 - }

{\mathrm{H}^ + }