A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of oxygen can be liberated by the same current in same time?

1 g

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2 g

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3 g

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4 g

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Solution

The correct option is D
4 g

Using Faraday's laws, $\frac{W_{1}}{E_{1}} = \frac{W_{2}}{E_{2}}$

The equivalent mass of hydrogen is 1 and that of oxygen is 8, so 8 times as much oxygen will be liberated.

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A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of oxygen can be liberated by the same current in same time?

The correct option is D 4 g Using Faraday's laws, W1E1=W2E2 The equivalent mass of hydrogen is 1 and that of oxygen is 8, so 8 times as much oxygen will be liberated.

The correct option is D
4 g

Using Faraday's laws, $\frac{W_{1}}{E_{1}} = \frac{W_{2}}{E_{2}}$

The equivalent mass of hydrogen is 1 and that of oxygen is 8, so 8 times as much oxygen will be liberated.