The missing ion in the following equation Cr(OH)3+CIO−+OH−→?+Cl−+H2O is

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The missing ion in the following equation _{$C r {(O H)}_{3} + C I O^{-} + O H^{-} \to ? + C l^{-} + H_{2} O is$}

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_{$C r_{2} O_{7}^{2 -}$}

_{$C r^{3 +}$}

_{$C r O_{4}^{2 -}$}

_{$C r_{2} O_{3}$}

answer is C.

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Detailed Solution

In basic medium, chromium salts from chromates. Therefore, the balanced equation is

_{$C r {(O H)}_{3} + 2 C l O + O H^{-} \to$}

_{$C r O_{4}^{2 -} + 2 C l^{-} + 2 H_{2} O$}

Thus, the missing ion is _{$C r O_{4}^{2 -}$} and hence option (c) is correct.

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