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Q.

How many moles of ${KMnO}_{4}$ are needed to oxidise a mixture of 1 mole of each ${FeSO}_{4}$ and ${FeC}_{2} O_{4}$ in acidic medium?

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a

$\frac{4}{5}$

b

$\frac{5}{4}$

c

$\frac{3}{4}$

d

$\frac{5}{3}$

answer is A.

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Detailed Solution

The number of moles of ${KMnO}_{4}$ can be calculated as,

$n \times 5 = 1 \times 1 + 1 \times 3$

N= $\frac{4}{5}$

Thus, the correct option is $\frac{4}{5}$

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