$4.5$ g of Aluminium(At mass $27$ amu) is deposited at cathode form $A l^{3 +}$ solution by a certain amount of electric charge. The volume of hydrogen produced at STP form $H^{+}$ ions in solution by the same quantity of charge will be:

44.8

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22.4

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11.2

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5.6

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Solution

The correct option is D $5.6$ L
$A l^{3 +} + \frac{3}{2} H_{2} \to 3 H^{+} + A l$
$1 F a r a d a y = 1 e q u i v a l e n t$
Equivalent weight of $A l = \frac{27}{3} = 9 g$
Number of equivalent $(A l) = \frac{A l w e i g h t}{e q u i v a l e n t w e i g h t} = \frac{4.5 g}{9 g} = 0.5$
Required faraday is $0.5$
Volume occupied $= \frac{V_{S T P}}{2} = \frac{22.4}{2} = 11.22$
For $0.5$ volume occupying $= 11.2 \times 0.5 = 5.6 L$

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4.5g of Aluminium(At mass 27 amu) is deposited at cathode form Al3+ solution by a certain amount of electric charge. The volume of hydrogen produced at STP form H+ ions in solution by the same quantity of charge will be:

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