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Questions  >>  SAT  >>  Chemistry  >>  Oxidation & Reduction
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The value of x in the partial redox equation $MnO^{−4}+8H^{+} + xe ⇌ Mn^{2+}+4H2O$ is

$\begin{array}{1 1} (a)\;5 \\ (b)\;3 \\ (c)\;1 \\ (d)\;0 \end{array} $

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