The weight of silver (at. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of at STP will be [2014]

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Solution

Q.
The weight of silver (at. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of $O_{2}$ at STP will be [2014]

1 5.4 g

2 10.8 g

3 54.0 g

4 108.0 g

Ans.
(4)

According to Faraday’s second law,

$\frac{W_{A g}}{E_{A g}} = \frac{W_{O_{2}}}{E_{O_{2}}}$ or $\frac{W_{A g}}{108} = \frac{\frac{5600}{22400} \times 32}{8}$

or $\frac{W_{A g}}{108} = \frac{8}{8} \Rightarrow W_{A g} = 108$ $g$

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