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Question

4.5 g of Aluminium is deposited at cathode from Al3+ solutions by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be:


A

44.8 L

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B

22.4 L

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C

11.2 L

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D

5.6 L

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Solution

The correct option is D

5.6 L


No. Of equivalents of 'Al' deposited = \(\left(\frac{4.5}{9}\right) = 0.5\)
Volume of H2 gas at STP = No. Of equivalents × Equivalent Volume= 0.5× 11.2 = 5.6 L


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