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

No.of equivalents of aluminium deposited = 4.5/9 = 0.5

No.of equivalents of H2 will also be 0.5

Volume of H2 gas at STP = No.of equivalents x Equivalent volume = 0.5 x 11.2 = 5.6 L

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