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Faraday's First Law

Two moles of ...

Question

Two moles of electrons can do which of the following:
I. Reduce one mole of $A g^{+}$ to $A g$
II. Reduce one mole of $C u^{2 +}$ to $C u$
III. Reduce $\frac{2}{3}$ mole of $A l^{3 +}$ to $A l$

I, I I, a n d I I I

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I a n d I I o n l y

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I I a n d I I I o n l y

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I o n l y

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Solution

The correct option is D $I I a n d I I I o n l y$
$C u^{2 +} + 2 e \to C u$

1 mole of $C u^{2 +}$ requires 2 moles of electrons to reduce to $C u$

$\frac{2}{3} A l^{3 +} + 2 e \to \frac{2}{3} A l$

$\frac{2}{3}$ moles of $A l^{3 +}$ requires 2 moles of electrons to reduce to $A l$ .

Hence, option $C$ is correct.

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Similar questions

A g^{\oplus}

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How much charge is required for the following reductions :

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(ii) 1 mole of $C u^{2 +}$ to Cu ?

(iii) 1 mole of $M n O_{4}^{-} t o M n^{2 +}$ ?

A g^{+}

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