$C r_{2} O_{7}^{- 2} + I^{-} + H^{+} \to C r^{+ 3} + I_{2} + H_{2} O$
The equivalent weight of the reductant in the above equation is: (At . wt. of Cr = 52, I = 127)

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127

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63.5

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10.4

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Solution

The correct option is A 127
This reaction is disproportionate reaction
$n f a c t o r = \frac{n_{1} \times n_{2}}{n_{1} + n_{2}} = \frac{6 \times 1}{6 + 1} - \frac{6}{7}$
Equilateral weight $= \frac{m o l a r m a s s}{n f}$
Reductase here is $I^{-}$
Equilateral weight $= \frac{127}{1} = 127$

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C_{2} O_{7}^{- 2} + I^{-} + H^{+} \to {C r}^{+ 3} + l_{2} + H_{2} O

(A t . w t .

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