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Q. Equivalent weight of $K_{2}Cr_{2}O_{7}$, in the following reaction is
$Cr_{2}O^{2-}_{7} Fe^{2+} \to Fe^{3+} Cr^{3+}$
($M=$ molar mass of $K_{2}Cr_{2}O_{7}$)

Redox Reactions

Solution:

Correct answer is (b) $\frac{M}{6}$

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