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Types of Redox Reactions

It requires ...

Question

It requires $40 m l$ 1 M $C e^{4 +}$ to titrate 20 ml of 1 M $S n^{2 +}$ to $S n^{4 +}$

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Solution

The correct option is B 3
$C e^{+ 4} + S n^{2 +} ⟶ C e^{n} + S n^{4 p}$
Number of $S n$ equivalents= $20 \times 1 \times 2 = 40$
Number of $C e$ equivalents=Number of $S n$ equivalents
$40 \times (4 - n) \times 1 = 40$
$\Rightarrow 4 - n = 1$
$\Rightarrow n = 3$ .

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