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Question

4.5 g of aluminium (At. mass =27 atm) is deposited at cathode from Al3+ solution 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
Number of equivalents of aluminium deposited
=4.59=0.5
Number of equivalents of H2 will also be 0.5.
Volume of H2 gas at STP = Number of equivalents × Equivalent volume
=0.5×11.2
=5.6 L.

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